navitwin iv.pdf
TRANSCRIPT
Operation, Installation and Service Manual
Off Hdg.10˚
Set Hdg.246.0
DISPLAY DATA
MONITOR
ALARM
NO ACTIVE
ALARM
Hdg. Diff10˚
Gyro 1Gyro 2
GYRO
1
GYRO
2
GYRO
3
MAGN
COMP
246.8
246.7
246.8
247.0
12.8 kn
AUTO
SPEED
NAVITWIN IV
Heading Management System
056344/A, 16 Mar 2006
Northrop Grumman Sperry Marine B.V. (Representative Office)Woltmanstr. 19 • D-20097 • Hamburg, Germany
Tel.: +49-40-299 00-0 • Fax: +49-40-299 00-146 • E-mail: [email protected]
056344/A NAVITWIN IV
© 2006 Northrop Grumman Sperry Marine B.V.This document and the information herein is the intellectual property of Northrop Grumman Sperry Marine B.V. [NGSM BV] and it’s associate companies and may not be copied or repro-duced without the express permission of NGSM BV.Specifications were correct at time of press but may be varied in accordance with NGSM BV’s policy of continuous product development.Any technical content should be verified with NGSM BV.
Sperry Marine, with worldwide headquarters in Charlottesville, VA, and major engineering and support offices in Melville, NY, New Malden, England, and Hamburg, Germany, is part of the Northrop Grumman Electronic Systems sector.
Revision Record
Rev. Date Remarks
A 16 Mar 2006 initial release
NAVITWIN IV 056344/A
Safety Instructions
Safety Notice Conventions
The following safety notice conventions are followed throughout this manual:
DANGER A Danger notice contains an operating or main-tenance procedure, practice, condition, state-ment, etc., which, if not strictly observed, will
result in injury or death of personnel.
WARNING A Warning notice contains an operating or maintenance procedure, practice, condition, statement, etc., which, if not strictly observed, could result in injury or death of personnel.
CAUTION A Caution notice contains an operating or main-tenance procedure, practice, condition, state-ment, etc., which, if not strictly observed, could
result in damage to, or destruction of equip-
ment.
Note A Note contains an essential operating or main-tenance procedure, condition or statement, which is considered important enough to be highlighted.
Special safety symbols may be used in this manual to indicate:
Risk of electrical shock.
Used in conjunction with a Danger or Warning notice.
Electrical components are sensitive to electro-static discharge.Used in conjunctin with a Caution notice.
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056344/A NAVITWIN IV
General Safety Information for the Operator
General Safety Information for Service Personnel
WARNING NAVITWIN IV permits to activate a heading source as soon as heading
data is received from the respective device.
Make sure that a gyrocompass has settled before using its heading as
the reference for heading control systems, RADAR, ECDIS, etc.
A magnetic heading source should be made active only in case of failure
of the gyrocompass(es).
CAUTION When the NAVITWIN IV is used in a system containing the fiber-optic gyrocompass NAVIGAT 2100:At each new alignment (restart) of the NAVIGAT 2100, make sure that the compass aligns correctly, using valid speed and position data.It is required to confirm the correct input data at the NAVIGAT 2100 con-trol and display unit when a new alignment is carried out.
WARNING Hazardous voltage is present inside the NAVITWIN IV.
Danger of electrical shock or burn when the CCFL inverter connections
are touched.
Disconnect power before opening the device.
When servicing the device without the back cover installed, do not touch
the PCB while power is applied to the board.
CAUTION The NAVITWIN IV contains electrostatic sensitive components.
Electrostatic discharge may permanently damage components.
When servicing the NAVITWIN IV, take precautions to prevent electro-static discharge. Avoid touching any of the electronic circuitry.
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NAVITWIN IV 056344/A
Contents
Chapter 1: Introduction
1.1 Design and Main Features........................................................................ 1-1
1.2 Example System Configurations ............................................................. 1-2
Standard NAVIGAT Dual Gyrocompass/TMC System ........................... 1-2Triple Gyrocompass/TMC System ........................................................... 1-3Independent Off Heading / Heading Diff. Alarm Device......................... 1-4
1.3 Technical Data............................................................................................ 1-5
Chapter 2: Operation
2.1 Display and Operating Keys ..................................................................... 2-1
Display ....................................................................................................... 2-1Operating Keys .......................................................................................... 2-1
2.2 External control devices ........................................................................... 2-2
2.3 Power-up Sequence .................................................................................. 2-2
2.4 Selecting the active heading source ....................................................... 2-3
2.5 Selecting additional display data ............................................................ 2-4
2.6 Adjusting the display brightness............................................................. 2-4
2.7 Optional Functions.................................................................................... 2-5
Muting Alarms Remotely.......................................................................... 2-5Resetting/Acknowledging a Central Watch Alarm .................................. 2-5Reversing the Heading Display (180° offset)........................................... 2-5External Dimming ..................................................................................... 2-5
2.8 Operating Menu ........................................................................................ 2-6
Entering and Quitting the Menu Mode.................................................... 2-6Navigating the Menu ................................................................................ 2-7Selecting Parameter Settings ................................................................... 2-8Editing Parameter Values ......................................................................... 2-8
2.9 Off Heading Monitor Settings.................................................................. 2-9
2.10 Heading Diff. Monitor Settings .............................................................. 2-10
2.11 Manual Settings Menu ........................................................................... 2-11
Manual Settings – Overview ...................................................................2-11Manual Settings – Parameters ............................................................... 2-13
Speed ........................................................................................... 2-13Mag Variation .............................................................................. 2-15Rate of Turn ................................................................................. 2-16North Sp. Err. Corr....................................................................... 2-16
2.12 User Setup ............................................................................................... 2-17
User Setup – Overview ........................................................................... 2-17User Setup – Parameters ........................................................................ 2-18
Date & Time................................................................................. 2-18Magn. Cal. Tab............................................................................. 2-18Version Info ................................................................................. 2-19
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056344/A NAVITWIN IV
Chapter 3: Alarm System
3.1 Alarm Indication ........................................................................................3-1
Audible Alarm Indication ..........................................................................3-1Single Beep: Invalid Action ..........................................................3-1Continuous Beeping: Pending Alarm ..........................................3-1
Visual Alarm Indication.............................................................................3-1
3.2 Acknowledging Alarms/Muting the Audible Alarm...............................3-2
Local Alarm Acknowledge ........................................................................3-2External Alarm Mute .................................................................................3-2
3.3 Viewing the active alarms ........................................................................3-3
3.4 Alarm messages ........................................................................................3-4
Internal Alarms ..........................................................................................3-4External Alarms (from NAVIGAT compasses).........................................3-6
Chapter 4: Scheduled Maintenance
4.1 Maintenance by Shipboard Personnel ....................................................4-1
Chapter 5: Installation
5.1 Mechanical Installation.............................................................................5-1
Console Mounting..................................................................................... 5-1Console Frame Version .............................................................................5-1Housing with Bracket ................................................................................5-1Connector Cable ........................................................................................5-1
5.2 Electrical Installation.................................................................................5-2
Wiring Up the System...............................................................................5-2
5.3 Initial System Configuration ....................................................................5-2
5.4 Magnetic Heading Calibration .................................................................5-3
Calibration Procedure ...............................................................................5-3Determining magnetic heading correction values .....................5-4Storing the magnetic heading calibration table .........................5-5Deleting entries from the magnetic heading calibration table..5-6
Chapter 6: System Configuration
6.1 Service Setup Menu..................................................................................6-1
Setup Access Code....................................................................................6-1Service-Setup – Overview.........................................................................6-2Service Setup – Parameters......................................................................6-6
Gyro 1.............................................................................................6-6Gyro 2.............................................................................................6-7Gyro 3/Magn..................................................................................6-8Set Hdg./GPS ............................................................................... 6-10RS422 Outp. 1.............................................................................. 6-11RS422 Outp. 2.............................................................................. 6-12Port Settings ................................................................................ 6-14Internals ....................................................................................... 6-16
iv
NAVITWIN IV 056344/A
Chapter 7: Troubleshooting
7.1 General Troubleshooting Instructions..................................................... 7-1
7.2 Location of Parts on the NAVITWIN IV PCB ........................................... 7-2
Exchangeable Components...................................................................... 7-3Connectors................................................................................................. 7-3Diagnostic LEDs......................................................................................... 7-4
Chapter 8: Corrective Maintenance
8.1 Exchanging the System Software ........................................................... 8-1
Downloading Software from the Flashboard.......................................... 8-1Exchanging the Flashboard.......................................................... 8-2
Uploading Software via the Service Interface ........................................ 8-3
8.2 Replacing the RS-422 Output Driver IC ................................................... 8-3
Appendix A: Setup and Configuration Tables
Appendix B: Drawings
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056344/A NAVITWIN IV
vi
NAVITWIN IV 056344/A
Chapter 1: Introduction
1.1 Design and Main Features
The Heading Management System NAVITWIN IV performs a number of control and monitoring functions within a multicompass system:
• It displays the actual heading from the available heading sources and lets the operator select the active source for distribution to other equipment, e.g. heading control systems, RADAR, compass repeat-ers etc.NAVITWIN IV can display up to three true heading and one magnetic compass heading source.
• It monitors the difference between any two of the available heading sources.Should the difference exceed a user-defined threshold, a "Heading Difference Alarm" is given.
• It monitors the difference between the active source’s heading and the commanded set heading in automatic steering modes.Should the difference exceed a user-defined threshold, an "Off Head-ing Alarm" is given.The set heading may be received automatically from a heading con-trol system or entered manually.
• It reads the analogue signals from a Sperry Marine fluxgate sensor, type 4863, and converts these into magnetic heading data in NMEA format, including automatic correction for magnetic variation and sensor calibration values.
• It serves as the central operating and control unit for dual and triple gyrocompass systems with the NAVIGAT X MK 1, MK 2 and NAVI-GAT 2100 compasses.System-wide operational settings and setup parameters are entered at the NAVITWIN IV and transmitted to the connected compasses.
Design and Main Features 1-1
056344/A NAVITWIN IV
1.2 Example System Configurations
The following simplified configuration examples illustrate some typical applications of the NAVITWIN IV.
Standard NAVIGAT Dual Gyrocompass/TMC System
The system shown in Figure 1-1 below is the standard configuration for a dual gyrocompass system with Sperry Marine gyrocompasses type NAVIGAT X MK 1 or NAVIGAT 2100.
By selecting the active heading source at the NAVITWIN IV , the opera-tor determines which compasses’ data is distributed via the Switch-Over Unit to external equipment, such as heading control systems, RADAR, compass repeaters etc.
The heading diff. alarm function permits to monitor the difference between any two of the available heading sources.The off heading alarm function permits to monitor the difference between the actual heading from the active source and the set heading order received from a heading control system.
Alarms generated locally by a NAVIGAT gyrocompass are indicated and may be acknowledged at the NAVITWIN IV.In turn, the NAVITWIN IV transmits system-wide operational settings and setup parameters to the NAVIGAT gyrocompasses.In a NAVIGAT dual gyrocompass system, the available heading sources and the hdg. diff threshold are also indicated at both gyrocompasses.
If a magnetic heading source is installed, NAVITWIN IV applies magnetic variation and distributes the data to external equipment (TMC function). In case of failure of the gyrocompasses, the magnetic heading source may be activated to provide an emergency heading reference for repeat-ers and other peripheral equipment.
Figure 1-1:
NAVIGAT DualGyrocompass System
MagneticCompass
Gyrocompass NAVIGAT X MK 1
or NAVIGAT 2100
Gyrocompass NAVIGAT X MK 1
or NAVIGAT 2100
GYRO
1
GYRO
2
MAGN
COMP
246.8
246.7
247.0
G1 Hdg.
G2 Hdg.
M Hdg.Source Sel. Status
Alarm Status (Hdg. Diff, Off Hdg)
G/ M Headings, RoT, and all other data/signals distributed via Switch-Over Unit
Switch-Over Unit
NAVITWIN IV
Steering Mode StatusSet Heading
from vessel's steering/ heading control system:
M Hdg.
1-2 Example System Configurations
NAVITWIN IV 056344/A
Triple Gyrocompass/TMC System
In a triple gyrocompass system, the NAVITWIN IV displays the heading data from three true heading sources and the magnetic heading from a fluxgate sensor, type 4863 (if installed).
By selecting the active heading source at the NAVITWIN IV, the operator determines which compasses’ data is distributed to external equipment, such as heading control systems, RADAR, compass repeaters etc.In a triple gyrocompass system, the NAVITWIN IV controls two cascaded Switch-Over Units to distribute the data as required.
The heading diff. alarm function permits to monitor the difference between any two of the available heading sources.The off heading alarm function permits to monitor the difference between the actual heading from the active source and the set heading order received from a heading control system.
Alarms generated locally by a NAVIGAT compass within a triple gyro-compass system are indicated and may be acknowledged at the NAVITWIN IV.In turn, the NAVITWIN IV transmits system-wide operational settings and setup parameters to NAVIGAT gyrocompasses.In contrast to the standard dual NAVIGAT system, the gyrocompasses in a triple system are configured as stand-alone devices. Only the own heading is displayed locally at the respective gyrocompass.
If a fluxgate sensor, type 4863, is installed, NAVITWIN IV applies mag-netic variation and distributes magnetic heading data to external equip-ment (TMC function). In case of failure of the gyrocompasses, the magnetic heading source may be activated to provide an emergency heading reference for repeaters and other peripheral equipment.
Figure 1-2:
Triple Gyrocompass/TMC system
MagneticCompass
GYRO 3
GYRO 2
GYRO 1
GYRO
1
MAGN
COMP
246.8
247.0
GYRO
2 246.7
G3 Hdg.
G2 Hdg.
G1 Hdg.
M Hdg.
Alarm Status (Hdg. Diff, Off Hdg)
G/ M Headings, RoT, and all other data/signals distributed via Switch-Over Units
Switch-Over Units
NAVITWIN IV
Steering Mode StatusSet Heading
from vessel's steering/ heading control system:
GYRO
3 246.9
Source Sel. Status
M Hdg.
Example System Configurations 1-3
056344/A NAVITWIN IV
Independent Off Heading / Heading Diff. Alarm Device
Another typical application for the NAVITWIN IV is to retrofit an existing gyrocompass system with an independent off heading and/or a heading difference alarm device.
In these cases, the NAVITWIN IV is used as a monitoring device only. The device is not used to select the active heading source or to distrib-ute data to external equipment.
Figure 1-3 below shows a simple system where the NAVITWIN IV is used to monitor the difference between a gyro and a magnetic compass and also to monitor the difference between the actual heading from the reference selected and the set heading order as received from a heading control system or entered manually.
Figure 1-3:
Independentoff hdg./hdg. diff.
alarm system
GYRO
1
MAGN
COMP
246.8
247.0
G1 Hdg.
Alarm Status (Hdg. Diff, Off Hdg)
NAVITWIN IV
Steering Mode StatusSet Heading
from vessel's steering/ heading control system:
MagneticCompass
GYRO 1
M Hdg.
1-4 Example System Configurations
NAVITWIN IV 056344/A
1.3 Technical Data
Environmental Requirements
ambient temperature, operation –15 to +55 °C
ambient temperature, storage –25 to +70 °C
protection grade PN 74813 (for console mounting):IP 56 to DIN 40050, if installed with seal in console panel/framePN 74819 (in housing with bracket): IP 23 to DIN 40050
environmental conditions / EMC in accordance with IEC 60945
Magnetic Clearance
to standard magnetic compass 0.70 m
to steering magnetic compass 0.40 m
reduced, to standard magnetic compass 0.45 m
reduced, to steering magnetic compass 0.30 m
Power Supply
supply voltage 24 VDC (18-36 V)
max. ripple content ±4 Vpp; extreme values may not exceed 36 V or fall below 18 V
power consumption 12 W
Dimensions and Weight
PN 74813 (for console mounting)
width 288 mm
height 96 mm
depth 44 mm; approx. 100 mm backward clearance from mounting surface required for connector cable and plug
weight 1 kg approx.
PN 79361 (PN 74813 factory-assembled in console frame)
frame width 319 mm
frame height 127 mm
PN 74819 (in housing with bracket)
width 350 mm
max. height (unit in vertical position)
150 mm
max. depth (unit in horizontal position)
130 mm
weight 2.15 kg approx.
Technical Data 1-5
056344/A NAVITWIN IV
Data Inputs
true heading (3x) NMEA 0183or PLATH protocol
magnetic heading, serial*
* If serial magn. hdg. input is used, max. 2 true hdg. inputs are available.
NMEA 0183or PLATH protocol
autopilot set heading / GPS speed/pos. NMEA 0183or NAVIPILOT†
† If NAVIPILOT format ist used, input receives set heading only.
Signal and Status Inputs
magnetic heading, fluxgate sensor sin., cos. and ref. voltages from Sperry Marine flux-gate sensor type 4863
steering mode status (auto/man) connection to P.Gnd via ext. contact,latching
ext. alarm acknowledge status (mute) connection to P.Gnd via ext. contact,momentary, n.o.
ext. dim+ or G1/G2 ctrl. status connection to P.Gnd via ext. contact,dim+: momentary, n.o.,G1/G2 ctrl.: latching
ext. dim-, offset 180° or G/M|G/G3 ctrl. status
connection to P.Gnd via ext. contact,dim-: momentary, n.o.,offset 180°: latching,G/M|G/G3 ctrl.: latching
1-6 Technical Data
NAVITWIN IV 056344/A
Data Outputs
serial data RS-422 output 1 if available, all of:gyrocompass headingmagnetic compass headingrate of turnheading reference statuscomp. mon. op. data
serial data RS-422 output 2 if available, all or selectable sub-set of:gyrocompass headingmagnetic compass headingrate of turnheading reference statuscomp. mon. op. data
serial data TTL output if available, all of:gyrocompass headingmagnetic compass headingrate of turnheading reference statuscomp. mon. op. data
Alarm and Status Outputs
power failure/general alarmheading difference alarmoff heading alarmwatch alarm acknowledge
potential-free relay contacts,each rated30 VDC/1.0 A,100 VDC/0.3 A,125 VAC/0.5 A;
G1/G2G/G3G/M
outputs to Switch-Over-Unit;open collector, drawn to Gnd potential in “on” status
Technical Data 1-7
056344/A NAVITWIN IV
1-8 Technical Data
NAVITWIN IV 056344/A
Chapter 2: Operation
2.1 Display and Operating Keys
Figure 2-1:
NAVITWIN IVoperating unit
Display
Operating Keys
➀ Heading Source Window: Shows the available heading sources and their actual values. The currently active heading source is indi-cated by a thick border and arrow symbols next the source’s name.
➁ Display Data Window: Shows additional data, such as rate of turn, speed/position and the alarm list.
➂ Monitor Window: Shows the heading diff. and off heading monitor-ing settings and status
➃ Alarm Window: Shows the current alarm status.
➄ Heading Source Selector Keys: Select the currently active heading source.
➅ Navigation Keypad: Arrow keys navigate through display data and menu screens; ENTER key confirms and stores selections made in menu screens.
➆ ACK key: Acknowledges pending alarms.
➇ MENU key: Calls up the operating menu from the normal opera-tional mode.
➈ DIM- / DIM+ keys: Adjust the display brightness.
Off Hdg.10˚
Set Hdg.246.0
DISPLAY DATA
MONITOR
ALARM
NO ACTIVE
ALARM
Hdg. Diff10˚
Gyro 1Gyro 2
GYRO
1
GYRO
2
GYRO
3
MAGN
COMP
246.8
246.7
246.8
247.0
12.8 kn
AUTO
SPEED
5 1 2 3 6
4 7 8 9
Display and Operating Keys 2-1
056344/A NAVITWIN IV
2.2 External control devices
Depending on the installation, external devices may be present which remotely control certain functions of the NAVITWIN IV:
• An external selector switch may be used to reverse the heading (apply a 180° offset to the heading data) e.g. for operation in double-ended ferries.
• The audible alarm at the NAVITWIN IV the may be muted from a remote device, e.g. a central alarm panel.
• External pushbuttons may be used to adjust the display brightness.
2.3 Power-up Sequence
The NAVITWIN IV is not equipped with a power switch. The device pow-ers up as soon as supply power is applied to the gyrocompass system.
Upon power up, the startup routine is executed:
A startup screen is shown and a system test sequence is executed.
A status line at the bottom of the screen indicates the progress and results of the following tests:RAM testI/O testChecksum testSetup Data test
When the system test has been passed, the NAVITWIN IV enters normal operational mode. The heading source window displays the heading data from the available compasses.
The currently active heading source is indicated by a bold frame and by arrow symbols next to the source’s name.
Off Hdg.10˚
Set Hdg.246.0
DISPLAY DATA
MONITOR
ALARM
NO ACTIVE
ALARM
Hdg. Diff10˚
Gyro 1Gyro 2
GYRO
1
GYRO
2
GYRO
3
MAGN
COMP
246.8
246.7
246.8
247.0
12.8 kn
AUTO
SPEED
Note Upon power-up, the NAVITWIN IV will activate the heading source which was selected when the device was last powered down.If no valid heading is available from this source, an alarm is given and the operator must activate a different source.
CAUTION When the NAVITWIN IV is used in a system containing the fiber-optic gyrocompass NAVIGAT 2100:At each new alignment (restart) of the NAVIGAT 2100, make sure that the compass aligns correctly, using valid speed and position data.It is required to confirm the correct input data at the NAVIGAT 2100 con-trol and display unit when a new alignment is carried out.
2-2 External control devices
NAVITWIN IV 056344/A
2.4 Selecting the active heading source
The operator may select one of the available heading sources as the “active” source, i.e. the heading reference to be distributed to compass repeaters, heading control system, RADAR, ECDIS etc.).
The currently active heading source is indicated by a bold frame around its display and a pair of arrow symbols next to the source name.
To change the active heading source:
Press the selector key next to the desired source’s heading display.
The selected source is made active.
GYRO
1
GYRO
2
246.8
246.7
GYRO
1
GYRO
2
246.8
246.7
Note The active heading source can be changed in a manual steering mode only.In automatic steering modes, source selection is disabled and an error beep will be given when a source selector key is pressed.
WARNING NAVITWIN IV permits to activate a heading source as soon as heading
data is received from the respective device.
Make sure that a gyrocompass has settled before using its heading as
the reference for heading control systems, RADAR, ECDIS, etc.
A magnetic heading source should be made active only in case of failure
of the gyrocompass(es).
Selecting the active heading source 2-3
056344/A NAVITWIN IV
2.5 Selecting additional display data
The data display window shows a selection of additional data received via the heading source inputs or the GPS/Auto input.
Depending on the available data, the operator may select one of up to five groups of data to be displayed in the display data window.
2.6 Adjusting the display brightness
Press the Up/Down arrow keys to scroll through the display data options.
If all relevant data is available, the follow-ing data groups are selectable:
• Position mode, latitude and longitude.
• Speed mode and actual value
• Mag. Variation mode and actual value
• Rate of Turn and North Speed Error Correction values (if received from gyrocompass type NAVIGAT)
• Date and Time (DD.MM.YY, hh.mm)
The selected data group is displayed until another group is selected.
Upon power-up, the NAVITWIN IV will dis-play the data group which was selected when the device was last powered down, providing the relevant data is available.
DISPLAY DATA
44˚09.46' N
023˚54.21' E
AUTO
POSITION
12.8 kn
AUTO
SPEED
1.2˚ E
MAN
MAG VARIATION
TIME
31.12.06
DATE
12:34
+32.1 ˚/min
RATE OF TURN
Speed Corr.
-1.4˚
The brightness of the display and keypad illumination is adjusted via the DIM+/DIM- keys:
Press the DIM+ key to increase the illumination brightness.Press the DIM- key to reduce the illumination brightness.
Off Hdg.10˚
Set Hdg.246.0
MONITOR
ALARM
NO ACTIVE
ALARM
Hdg. Diff10˚
Gyro 1Gyro 2
GYRO
2
GYRO
3
MAGN
COMP
246.7
246.8
247.0
Note The display brightness can only be adjusted in normal operational mode.The brightness setting is not retained between power-ups. NAVITWIN IV always powers up at maximum brightness.
2-4 Selecting additional display data
NAVITWIN IV 056344/A
2.7 Optional Functions
The following functions may be available if the system is equipped with the respective external controls and configured accordingly.
Muting Alarms Remotely
On alarm, actuate the mute control at a remote device (e.g. a central alarm panel). The audible alarm is muted.
Resetting/Acknowledging a Central Watch Alarm
If connected to a central watch alarm facility ('dead man alarm'), the NAVITWIN IV will automatically reset the watch alarm timer whenever a key is pressed on the unit.
Should a watch alarm be given, pressing any key at the NAVITWIN IV will acknowledge the alarm and reset the watch alarm timer.
Reversing the Heading Display (180° offset)
To reverse the heading display, e.g. for operation on double-ended fer-ries, activate the 180° offset function at the associated external control.
External Dimming
If external DIM+/DIM- pushbuttons are installed, these operate in parallel with the builtin DIM+/DIM- keys. If an external DIM+ button is installed only, it will increase the illumination level stepwise and, will revert to the lowest level when pushed past the maximum level.
Note A remotely muted alarm remains in the pending (unacknowledged) state. The alarm is indicated as pending in the alarm window until the alarm is acknowledged at the NAVITWIN IV or the cause of the alarm is elimi-nated.
Optional Functions 2-5
056344/A NAVITWIN IV
2.8 Operating Menu
The monitoring settings as well as the manual settings, user and service setup sub-menus are accessed through a multilevel operating menu.
Entering and Quitting the Menu Mode
From the normal operational mode, press MENU to enter the menu mode.
In the right hand side of the display, the Main Menu window opens, which now overlays the data display, moni-tor and alarm status windows.
The keys of the navigation keypad may now be used to navigate the menu, to select parameter settings and to edit parameter values.
From the main menu screen, press MENU to return to the normal opera-tional mode.
The menu window is closed and the data display, monitor and alarm status windows become visible again.
Off Hdg.10˚
Set Hdg.246.0
DISPLAY DATA
MONITOR
ALARM
NO ACTIVE
ALARM
Hdg. Diff10˚
Gyro 1Gyro 2
12.8 kn
AUTO
SPEED
OFF HDG ALRMHDG DIFF ALRMMAN. SETTINGSUSER SETUPSERVICE SETUP<< EXIT
MAIN MENU
OFF HDG ALARMHDG DIFF ALARMMAN SETTINGUSER SETUPSERV SETUP<< EXIT
MAIN MENU
Off Hdg.10˚
Set Hdg.246.0
DISPLAY DATA
MONITOR
ALARM
NO ACTIVE
ALARM
Hdg. Diff10˚
Gyro 1Gyro 2
12.8 kn
AUTO
SPEED
Note When the menu mode is active and no key is pressed for more than 30 seconds, the NAVITWIN IV automatically returns to normal operational mode.In the menu mode, the source selector keys are disabled and the bright-ness level cannot be adjusted.Should an alarm be given while the menu mode is active, the audible alarm is sounded, but the operator must return to the normal operational mode to view the alarm message and acknowledge the alarm.
2-6 Operating Menu
NAVITWIN IV 056344/A
Navigating the Menu
In the menu mode, the operator may navigate through the menu using the Right, Left, Up and Down arrow keys.
The arrow symbol ( ) at the left of the window indicates the cursor position on the current menu level.
With the Up/Down arrow keys, move to the cursor to the required sub-menu position.
Arrow symbols ( ) to the right of the window indicate that a sub-menu exists for the respective option.
Press the Right arrow key to enter a sub-menu.
Press the Left arrow key to return to the next higher menu level.
XXXXXXXX
AAAAAAAABBBBBBBBCCCCCCCC
CCCCCCCCBBBBBBBBAAAAAAAA
CCCCCCCCBBBBBBBBAAAAAAAA
MAIN MENU
XXXXXXXX
XXXXXXXX
YYYYYYYY
YYYYYYYYXXXXXXXX
ZZZZZZZZ
XXXXXXXX
MAIN MENU
XXXXXXXX
YYYYYYYYXXXXXXXX
< BACK
< BACK
Note Alternative key functions may be used to navigate the menu:- selecting a sub-menu option and pressing ENTER enters the sub-menu- pressing MENU in a sub-menu returns to the next higher menu level- selecting the “<BACK” option in a sub-menu and pressing ENTER
returns to the next higher menu level- selecting the “<<EXIT” option at the top menu level and pressing ENTER
quits the menu mode and returns to normal operational mode
Operating Menu 2-7
056344/A NAVITWIN IV
Selecting Parameter Settings
In a number of sub-menus, the operator is expected to select parameter settings from a list of available options.
The available options and the current selection are indicated by different symbols:
Radio buttons: Allow to select exactly one of the available options.
: selected
: deselected
Checkboxes: Allow to select or activate none, one or more of the available options.
: selected
: deselected
Editing Parameter Values
In a number of sub-menus, parameters are set by editing a numerical value or an alphanumerical string.
To select parameter settings in a sub-menu:
With the Up/Down arrow keys, move to the required option.
Press ENTER to confirm and store the selection.
MENU leaves the option sub-menu without changes.
To edit a parameter value in the respective sub-menu:
With the Up/Down arrow keys, edit the character at the current cursor position.
With the Right/Left arrow keys, move the cursor forward/back to edit the next/previous character.
Press ENTER to confirm and store the new value.
MENU leaves the option sub-menu without changes.
OPTION BOPTION A
OPTION C
OPTIONS
OPTION BOPTION A
OPTION C
OPTIONS
OPTION BOPTION A
OPTION C
00000
10000
10000
VALUE
VALUE:
VALUE
2-8 Operating Menu
NAVITWIN IV 056344/A
2.9 Off Heading Monitor Settings
NAVITWIN IV can monitor the difference between the actual heading from the active source and the set heading order in automatic steering modes. The set heading may either be received automatically from a heading or track control system or may be entered manually.
Should the difference between the actual and set headings exceed the alarm threshold, the “Off Heading Alarm” is given.
To set the parameters for off heading monitoring:
MAIN MENU
OFF HDG ALRM
AUTO
MODE
OFF
MAN
XXXXXXXX
THRESHOLD
Call up the Main Menu
Go to OFF HDG ALRM settings
To select the off hdg. alarm mode:
Go to MODE selection
Select required mode; OFF = alarm off AUTO = set hdg. auto receive MAN = set hdg. manual setting
To set the off hdg. alarm threshold:
Go to THRESHOLD setting
Edit threshold value; range: 0 – 99˚
XXXXXXXX
MAN. SET HDG
To set the manual set hdg. value:
Go to MAN SET HDG setting
Edit manual value; range: 0.0 – 359.9˚
Note When the set heading order is changed (a turn is ordered), monitoring becomes active only after the difference between the actual and set head-ings has once fallen below the alarm threshold.
Off Heading Monitor Settings 2-9
056344/A NAVITWIN IV
2.10 Heading Diff. Monitor Settings
NAVITWIN IV can monitor the difference between any two of the availa-ble heading sources. Should this difference exceed the alarm threshold, the “Heading Diff. Alarm” is given.
To set the parameters for heading diff. monitoring:
MAIN MENU
HDG DIFF ALRM
GY1/GY2
SOURCE
OFF
GY1/GY3
XXXXXXXX
THRESHOLD
GY1/MAGNGY2/GY3GY2/MAGNGY3/MAGN
Call up the Main Menu
Go to HDG DIFF ALRM settings
To select the monitored sources:
Go to SOURCE selection
Select sources; OFF = diff alarm off GY1/GY2 = true hdg. 1 vs. 2 GY1/GY3 = true hdg. 1 vs. 3 GY1/MAGN = true hdg. 1 vs. magn. GY2/GY3 = true hdg. 2 vs. 1 GY2/MAGN = true hdg. 2 vs. magn. GY3/MAGN = true hdg. 3 vs. magn.
To set the alarm threshold:
Go to THRESHOLD setting
Edit threshold value; range: 0 – 99˚
2-10 Heading Diff. Monitor Settings
NAVITWIN IV 056344/A
2.11 Manual Settings Menu
The Manual Settings menu provides access to settings which the opera-tor may need to alter more or less frequently during normal operation.
Manual Settings – Overview
Figure 2-2:
Manual Settings
Note Some of the manual settings have no direct effect at the NAVITWIN IV but will overwrite the corresponding values at connected gyrocompasses of types NAVIGAT X MK 1, MK 2, or NAVIGAT 2100.
SPEED
MODE
AUTO
MANUAL VALUE
value: -99.9 – 99.9 kn
AUTO2
MAN
contd. on next page
speed input settings
POSITION
MODE
AUTO
MANUAL LON
lon. value: 180˚00.00' W – 180˚00.00' E
AUTO2
MANUAL LAT
lat. value: 90˚00.00' S – 90˚00.00' N
MAN
position input settings
MAG VARIATION mag. variation input settings
MANUAL VALUE
value: 99.9˚ W – 99.9˚ E
MANUAL SETTINGS
SPEEDPOSITIONMAG VARIATION
AUTO
Manual Settings Menu 2-11
056344/A NAVITWIN IV
Figure 2-3:
Manual Settings(cont.d)
contd. from previous page
NAVIPRINT
not implemented in current software release
nav. data printer settings
RATE OF TURN
TIME CONSTANT
damping time constant: 0.0 – 10.0 s
MAX ROT ALARM
'max. ROT' alarm threshold: 0 – 6000 ˚/min
rate of turn settings
MANUAL SETTINGS
NORTH SP. ERR. CORR north speed error correction
NAVIPRINTRATE OF TURN
< BACK< BACKNORTH SP. ERR. C.
2-12 Manual Settings Menu
NAVITWIN IV 056344/A
Manual Settings – Parameters
Speed
Sets the speed input parameters.This setting is effective for the NAVITWIN IV internally and for all con-nected compasses evaluating the NAVITWIN IV op. data.
Mode
Selects the speed input mode.
Settings: AUTO
Speed data is read automatically from the serial data inputNAVIGAT 2100 compasses will use the Auto1 input
AUTO2
Speed data is read automatically from the serial data inputNAVIGAT 2100 compasses will use the Auto2 input
MAN
The actual speed value is entered manually
Manual Value
Sets the input value for manual speed data.
Value: -99.9 – 99.9 kn
Manual Settings Menu 2-13
056344/A NAVITWIN IV
Position
Sets the position input parameters.This setting is effective for the NAVITWIN IV internally and for all con-nected compasses evaluating the NAVITWIN IV op. data.
Mode
Selects the position input mode.
Settings: AUTO
Position data is read automatically from the serial data inputNAVIGAT 2100 compasses will use the Auto1 input
AUTO2
Position data is read automatically from the serial data inputNAVIGAT 2100 compasses will use the Auto2 input
MAN
The actual position value is entered manually
Manual Lat.
Sets the manual input value for the latitude.
Value: 90°00.00’ N – 90°00.00’ S
Manual Lon.
Sets the manual input value for the longitude.
Value: 180°00.00’ W – 180°00.00’ E
2-14 Manual Settings Menu
NAVITWIN IV 056344/A
Mag Variation
Sets the magnetic variation input parameters.This setting is effective for the NAVITWIN IV internally and for all con-nected compasses evaluating the NAVITWIN IV op. data.
AUTO
Selects the magnetic variation input mode.
Settings: ON (option checked)Mag. variation data is read automatically from the serial data input
OFF (option unchecked)The actual mag. variation value is entered manually
Manual Value
Sets the manual input value for mag. variation.
Value: 99.9° W – 99.9° E
NAVIPRINT
Sets the operating parameters for the NAVIPRINT nav. data printer.Thise settings are only effective for connected compasses evaluating the NAVITWIN IV op. data
Settings
At the time of writing of this manual, the NAVIPRINT settings are not yet implemented in the NAVITWIN IV system software.The printer must be set up locally via the manual settings menu at the respective compass(es). The local printer settings will not be overwritten by the NAVITWIN IV, as the printer settings are omitted in the op. data messages sent to the compasses.
Manual Settings Menu 2-15
056344/A NAVITWIN IV
Rate of Turn
Sets the rate of turn input parameters.This setting is only effective for connected compasses evaluating the NAVITWIN IV op. data.
Time Constant
Sets the damping time constant for rate of turn data.In NAVIGAT 2100 compasses, the “low” time constant is set.
Value: 0.0 – 10.0 s
Max. ROT Alarm
Sets the alarm threshold for the “Rate of Turn exceeded” alarm.
Value: 0.0 – 6000 °/min.
North Sp. Err. Corr.
Selects the North speed error correction mode for the connected gyro-compasses.This setting is effective only for conventional gyrocompasses of type NAVIGAT X MK 1 or NAVIGAT X MK 2.
Settings: ON (option checked)Automatic North speed error correction is enabled.
OFF (option unchecked)Automatic North speed error correction is disabled.
2-16 Manual Settings Menu
NAVITWIN IV 056344/A
2.12 User Setup
The User Setup menu provides access to settings which the operator may need to alter only occasionally.
User Setup – Overview
Figure 2-4:
User SetupDATE & TIME
DATE
man. value: DD.MM.YY
date and time settings
MAGN CAL TAB
USE CAL TAB
ENTER VALUES
enter, modify or delete cal. table entries
magnetic hdg. calibration table
VERSION INFO
view software version info (read-only)
software version info
TIME
man. value: hh:mm
USER SETUP
DATE & TIMEMAGN CAL TABVERSION INFO< BACK< BACK
AUTO
User Setup 2-17
056344/A NAVITWIN IV
User Setup – Parameters
Date & Time
Sets the date and time input parameters.
AUTO
Selects the date and time input mode.
Settings: ON (option checked)Date/time are read automatically from the serial data input
OFF (option unchecked)The current date and time are entered manually
Man. Date
Sets the current date manually.
Value: DD.MM.YY (current date in format day.month.year)
Man. Time
Sets the current time manually.
Value: hh:mm (current time in format hours:minutes)
Note If manual input is used, date and time must be set after each power-up.
Magn. Cal. Tab
Sets the parameters for the magnetic compass calibration table.
Use Cal Tab
Switches the automatic magnetic heading correction on or off.
Settings: ON (option checked)Automatic correction is enabled
OFF (option unchecked)Automatic correction is disabled
Enter Values
Enters the correction values into the magn. calibration table.
Values: max. 36 pairs of heading and correction values
2-18 User Setup
NAVITWIN IV 056344/A
Version Info
Displays the system software version info screen.
Settings: none
The software version sub-menu is read-only.
User Setup 2-19
056344/A NAVITWIN IV
2-20 User Setup
NAVITWIN IV 056344/A
Chapter 3: Alarm System
3.1 Alarm Indication
Audible Alarm Indication
Single Beep: Invalid Action
Continuous Beeping: Pending Alarm
Visual Alarm Indication
A single short beep indicates that the operator attempted to carry out an invalid action.This is the case, e.g. if the operator tries to change the heading reference in an automatic steering mode or to activate a head-ing source from which no valid data is received.
Continuous on-off beeping indicates that a pending (unac-knowldedged) alarm is present.Simultaneously, a corresponding alarm message is shown in the alarm window.
Green: no active alarms
If no alarms are active, the alarm window title bar and message area have a green background and the message “no active alarms” is shown.
Red: active alarm(s)
If one or more alarms are active, the alarm window title bar changes to red. A messages is shown which specifies the alarm at hand.Active alarms have one of two possible states:
Pending (unacknowledged):The cause of the alarm is present and the opera-tor has not yet acknowledged the alarm.The message background flashes red-white.
Acknowledged:The operator has acknowledged the alarm but the cause of the alarm is still present.The message background is white.
ALARM
NO ACTIVE
ALARM
ALARM (1/1)
TIMEOUT
GYRO 1
ALARM (1/1)
TIMEOUT
GYRO 1
Note Pending alarms from NAVIGAT gyrocompasses (“external alarms”) are indicated and may be acknowledged at the NAVITWIN IV.However, the NAVITWIN IV displays no acknowledged external alarms.
Alarm Indication 3-1
056344/A NAVITWIN IV
3.2 Acknowledging Alarms/Muting the Audible Alarm
Local Alarm Acknowledge
External Alarm Mute
To acknowledge a pending alarm at the NAVITWIN IV:
Press ACK.
The audible alarm indication is muted.
In case of an internal alarm, the alarm is now indicated as being acknowledged.
In case of an external alarm, the alarm is cleared at the NAVITWIN IV.
ALARM (1/1)
TIMEOUT
GYRO 1
ALARM (1/1)
TIMEOUT
GYRO 1
Note When an alarm has been acknowledged, the ext. alarm status output remains active until the cause of the alarm is eliminated.When the cause of an alarm is eliminated, the alarm is acknowledged automatically and the alarm status is cleared.The NAVITWIN IV does not keep a history of past (inactive) alarms.
To mute the audible alarm externally (e.g. from a central alarm panel):
Actuate the external mute facility.
The audible alarm indication is muted.
The visible alarm indication is not cleared and the alarm remains in the pending state until it is locally acknowledged at the NAVITWIN IV.
ALARM (1/1)
TIMEOUT
GYRO 1
ext. alarm mute
ALARM (1/1)
TIMEOUT
GYRO 1
3-2 Acknowledging Alarms/Muting the Audible
NAVITWIN IV 056344/A
3.3 Viewing the active alarms
If more than one active alarm is present, the total number of alarms and the index number of the currently displayed alarm are shown in the alarm window title bar.
To view all active alarms, scroll through the list of alarm messages with the Left or Right arrow key:
ALARM (2/3)
TIMEOUT
SPEED
ALARM (1/3)
TIMEOUT
GYRO 1
ALARM (3/3)
TIMEOUT
POSITION
Note As long as any pending (unacknowledged) alarms are present, these will automatically be redisplayed when other messages have been viewed, until all alarms have been acknowledged by the operator.
Viewing the active alarms 3-3
056344/A NAVITWIN IV
3.4 Alarm messages
Internal Alarms
Internal alarms are all alarm condition which the NAVITWIN IV senses by itself. Next to the “Off heading” and “Heading difference” monitoring alarms, these are the loss of data on the serial input lines and faulty return voltages from the fluxgate sensor.If the system is configured to read back the selection status from the Switch-Over Unit, an alarm is also given when the heading source selec-tion at the NAVITWIN IV differs from the status of the Switch-Over Unit.
Table 3-1:
Internal alarmmessages
message text cause corrective action
OFF HDGALARM
The difference between the actual heading and the set heading has exceeded the alarm threshold.
Determine the cause for the off heading con-dition.If heading control sys-tem is not capable of keeping set heading, change over to manual steering mode.If actual heading data appears incorrect, change over to manual steering mode and acti-vate a reliable heading source.
HDG DIFF. FAIL ALARM
The difference between the monitored heading sources has exceeded the alarm threshold.
Check the monitored heading sources for data integrity.If active source delivers incorrect data, change activate another source.If any monitored source delivers incor-rect data,select another pair of monitored sources or disable monitoring until problem is fixed.
TIMEOUTGYRO1
No valid data received from true heading source.(dashes shown in heading display of respective source)
If source is active, acti-vate another source immediately.Check function of the respective heading source and interface.
TIMEOUTGYRO2
TIMEOUTGYRO3
3-4 Alarm messages
NAVITWIN IV 056344/A
TIMEOUTMAGN
No valid data received from magnetic head-ing source (serial inter-face)
If source is active, acti-vate another source immediately.Check function of mag-netic heading source and interface.
INTERFACE FAIL MAGN
Interface failure mag-netic heading source (sin/cos fluxgate sen-sor)
If source is active, acti-vate another source immediately.Check function of flux-gate sensor and inter-face.
TIMEOUTPOSITION
No valid position data received from active source (NAVIGAT gyro-compass) or GPS
Check whether active source or GPS provides valid position data, check interface.
TIMEOUTSPEED
No valid speed data received from active source (NAVIGAT gyro-compass) or GPS
Check whether active source or GPS provides valid speed data, check interface.
TIMEOUTROT
No rate of turn data received from active source (NAVIGAT gyro-compass)
Check whether active source provides valid rate of turn data.
TIMEOUT SPEED_ERR_CORR
No North speed error correction data received from active source (NAVIGAT gyro-compass)
Check whether active source properly com-putes error correction
TIMEOUTMAGN_VAR
No valid magn. varia-tion data received from active source (NAVI-GAT gyrocompass) or GPS
Check whether active source or GPS provides valid magn. variation data, check interface.
TIMEOUTDATE
No valid date received from active source (NAVIGAT gyrocom-pass) or GPS
Check whether active source or GPS provides valid date/time, check interface.
TIMEOUTTIME
No valid time received from active source (NAVIGAT gyrocom-pass) or GPS
Check whether active source or GPS provides valid date/time, check interface.
TIMEOUTSET_HDG
No valid set heading data received from heading control system
Check whether heading control system pro-vides valid set heading, check interface.
INTERFACE FAIL. SWITCH OVER
Source selection sta-tus from Switch-Over Unit differs from active selection at NAVITWIN IV
Check status lines to/from Switch-Over Unit, check whether unit reacts properly to source selection.
message text cause corrective action
Alarm messages 3-5
056344/A NAVITWIN IV
External Alarms (from NAVIGAT compasses)
External alarms are the alarms transmitted by a NAVIGAT X MK 1, MK 2, or NAVIGAT 2100 gyrocompass. These alarms are displayed and may be acknowledged at the NAVITWIN IV. Once acknowledged, however, external alarms are cleared at the NAVITWIN IV.To determine whether an acknowledged external alarm is still active, the error list at the respective compass must be checked.
Table 3-2:
External alarmmessages
CAUTION When acknowledging an external alarm from a NAVIGAT 2100, make sure that the compass fully recovers from the error.Upon alarm acknowledge, the NAVIGAT 2100 executes the command which corresponds to confirming the alarm message, i.e. pressing the F1 key, at the compass.In certain cases, it may be necessary to take further action to return the NAVIGAT 2100 to normal operation, e.g. it might be required to change the speed or position data source or to execute a new align (restart) of the system.
message text cause corrective action
GYRO 1 FAIL Compass failure orcompass receives no data from external gyrocompass source.
If alarm given without an an internal gyro fail-ure occurring simulta-neously, check the interfaces/connections between the NAVIGAT gyrocompasses.
GYRO 2 FAIL
GYRO 3 FAIL
MAGN FAIL No data received from magnetic heading source.
If alarm given without an an internal gyro fail-ure occurring simulta-neously, check the interface/connection between the NAVIGAT gyrocompass and the magnetic heading source (normally the NAVITWIN IV).
SPEED FAIL No data received from serial speed input.(NAVIGAT 2100: serial speed input 1)
Check interface/con-nection between the NAVIGAT gyrocom-pass and the speed data source.
SPEED 2 FAIL NAVIGAT 2100:No data received from serial speed input 2
Check interface/con-nection between the NAVIGAT gyrocom-pass and the speed data source.
POSITION FAIL No data received from serial position input.(NAVIGAT 2100: serial position input 1)
Check interface/con-nection between the NAVIGAT gyrocom-pass and the position data source.
3-6 Alarm messages
NAVITWIN IV 056344/A
POS. 2 FAIL NAVIGAT 2100:No data received from serial position input 2
Check interface/con-nection between the NAVIGAT gyrocom-pass and the position data source.
HDG DIFF. FAIL Hdg. Diff. alarm thresh-old exceeded.
If alarm given without internal hdg. diff. alarm occurring simultane-ously, check the system configuration and the connection between the gyrocompass and the NAVITWIN IV.
MAX ROT EXC. Max. Rate of Turn alarm threshold exceeded.
“Max. ROT Exc.” alarm reminds the operator not to exceed preset threshold during turns. Prevent vessel from turning too fast or increase threshold if unwanted alarms are given.
GYRO CUR. ALARM NAVIGAT X MK 1 / 2:Excessive gyrosphere current.
check compass for proper function. If alarm persists, call Sperry Marine for serv-ice.
DC SUPPLY FAIL NAVIGAT X MK 1 / 2:Backup DC power sup-ply failure.
Check power supply to compass
AC SUPPLY FAIL NAVIGAT X MK 1:AC (main) power sup-ply failure.NAVIGAT X MK 2:Main DC power supply failure.
Check power supply to compass
ERROR 19 NAVIGAT 2100:Correction values out of range.
Alarm is given when-NAVIGAT 2100 roll/pitch correction values are changed by more than ±3°.Acknowlegde the alarm or cancel the change of correction values at the NAVIGAT 2100 directly.
ERROR 20 NAVIGAT X MK 1 / 2:Recommended gyro-sphere maintenance interval exceeded.
Acknowledge the alarm.Recommended gyro-sphere maintenance should be carried out in due time.
message text cause corrective action
Alarm messages 3-7
056344/A NAVITWIN IV
ERROR 21 NAVIGAT 2100:Communication fault between fiber-optic sensor and interface unit.
Acknowledge the alarm.Check proper function of the compass and take any further meas-ures required to return the NAVIGAT 2100 to normal operation.
ERROR 22 NAVIGAT 2100:Position plausibility error.
Acknowledge the alarm.Check proper function of the compass and take any further meas-ures required to return the NAVIGAT 2100 to normal operation.
ERROR 23 NAVIGAT 2100:Error status message received from fiber-optic sensor.
Acknowledge the alarm.Check proper function of the compass and take any further meas-ures required to return the NAVIGAT 2100 to normal operation.
NTIV COM. FAULT Compass receives no valid data from the NAVITWIN IV.Common parameters in Manual Settings / User Setup menues will not be transmitted to the compass.
Check the connection between NAVITWIN IV and the gyrocompass.
message text cause corrective action
3-8 Alarm messages
NAVITWIN IV 056344/A
Chapter 4: Scheduled Maintenance
4.1 Maintenance by Shipboard Personnel
The NAVITWIN IV is a solid-state electronic device and contains no con-sumable parts. Therefore, no set maintenance schedule is required.
The front plate should be kept clean and a regular visual inspection of cables and connectors should be carried out to detect any signs of dam-age or deterioration.
CAUTION The front plate is made of clear polycarbonate.Do not clean the front plate with organic solvents, acetone or any other substance which could damage or discolor plastic.Use only water and soap or a mild detergent to clean the front plate.
Maintenance by Shipboard Personnel 4-1
056344/A NAVITWIN IV
4-2 Maintenance by Shipboard Personnel
NAVITWIN IV 056344/A
Chapter 5: Installation
5.1 Mechanical Installation
Console Mounting
To mount the NAVITWIN IV directly in a console panel (without console frame) a panel cutout is required as shown in dimensional drawing 4994-0112-02 (see Appendix B). Suitable fasteners for console mounting are provided in the installation kit 22596.
A backward clearance of approx. 100 mm from the mounting surface is required to protect the connector cable from being bent too strongly at the plug.
Console Frame Version
When ordered factory-assembled in a console frame, the NAVITWIN IV is already fastened to the frame. The required cutout for a standard 3x1 frame is shown in dimensional drawing 0031-0112-02 (see Appendix B).
If a custom frame is delivered, installation-specific dimensional draw-ings for the frame and cutout will be provided with the equipment.
A backward clearance of approx. 100 mm from the frame top surface is required to protect the connector cable from being bent too strongly at the plug.
Housing with Bracket
The NAVITWIN IV housing with bracket is shown in dimensional draw-ing 4994-0112-02 (see Appendix B). The mounting bracket carries four holes of 5.3 mm dia. for fixing the bracket to any plane surface, such as a console panel, wall or ceiling. The required fasteners are to be provided by the shipyard or installer.
Connector Cable
The NAVITWIN IV connector cable terminates into a 50-wire pigtail for connection to a terminal block (see Appendix B).
If the optional connection box is not used, the required terminal block is to be provided by the shipyard or installer. The installer must make sure that the end of the cable sheath is firmly secured to the vessel structure with tie-wraps or other suitable means, so that the individual wires are free from tension at the terminals. Unused wires, if not connected to ter-minals, must be isolated and fastened to the end of the cable sheath.
Mechanical Installation 5-1
056344/A NAVITWIN IV
5.2 Electrical Installation
Wiring Up the System
Wire up the system according to the connection diagrams and other rel-evant documents provided.
If installation-specific connection diagrams have been provided for a given system, these supersede any connection information contained in standard connection diagrams.
If wiring up according to standard connection diagrams, make sure beforehand that all data and signals to receive from or transmit to exter-nal equipment are compatible with the NAVITWIN IV I/O specifications, according to interface specification 004994-0120-001.
5.3 Initial System Configuration
When the system has been wired up, all configuration parameters are to be set to the required values in the Service Setup in order to make the NAVITWIN IV fully functional. For a description of the Service Setup, refer to Chapter 6.
The operating parameters in the User Setup and Manual Settings men-ues should also be set as required for normal operation within the given system.
If a magnetic heading source is connected to the NAVITWIN IV, the mag-netic compass calibration procedure should be carried out during a sea trial, as described in the following section.
CAUTION When wiring up the system, make sure that the power supply for the NAVITWIN IV is switched off and is safeguarded against accidental switching-on.
5-2 Electrical Installation
NAVITWIN IV 056344/A
5.4 Magnetic Heading Calibration
Ideally, the magnetic heading displayed at the NAVITWIN IV would exactly match the indication of the steering magnetic compass (at a mag. variation of 0.0°).In practice, however, deviations will occur between the steering mag-netic compass heading and the heading data transmitted by a fluxgate sensor or an electronic compass, as displayed at the NAVITWIN IV.
The NAVITWIN IV automatically corrects such deviations if a calibration table has been stored and calibration is activated in the User Setup.
Calibration Procedure
The magnetic heading calibration is a two-part procedure.
First, the existing deviations between the indication of the steering mag-netic compass and the magnetic heading displayed at the NAVITWIN IV are determined. This requires that the vessel is swung very slowly through a full circle so that for each full 10° of magnetic compass head-ing (0, 10, ..., 350°) the corresponding display value is obtained.
After calculating the resultant correction values, these are entered in the magnetic heading calibration table at the NAVITWIN IV.
The calibration table stores up to 36 entries (’cal. no.s’), each of which assigns a correction value to a given magnetic heading (0, 10, ..., 350°).
Note The magnetic heading calibration serves to match, as closely as possible, the indication at the steering magnetic compass and the magnetic head-ing displayed at the NAVITWIN IV, at a mag. variation of 0.0°.It is strongly disapproved to use a true heading source, e.g. a gyrocom-pass, as the calibration reference.Also, it should not be attempted to correct residual deviations of a prop-erly adjusted magnetic compass by means of the calibration table.
CAUTION The magnetic heading calibration corrects deviations due to the com-bined effects of the magnetic environment, the particular sensor being used and the receiving circuitry inside the NAVITWIN IV.Therefore, a new calibration must be carried out when:- the steering magnetic compass is exchanged or newly adjusted,- the magnetic heading sensor is exchanged and,- if a fluxgate sensor is used, when the NAVITWIN IV itself is exchanged.
CAUTION The magnetic compass used as the calibration reference must be prop-erly installed and adjusted.The procedure should be carried out in calm seas only.Make sure that ample sea area is available for the vessel to execute a very slow 360°-turn.
Magnetic Heading Calibration 5-3
056344/A NAVITWIN IV
Determining magnetic heading correction values
1. Make sure that the magnetic variation is set to 0.0° in the Manual Settings menu.
2. Make sure that the calibration is disabled (option ’use cal tab’ unchecked) in the User Setup / Magn. Cal. Tab.
3. Select a manual steering mode.
4. Commence a continuous, very slow and steady turn. The vessel must turn through one full circle (360°) at least.
5. While the vessel is turning, com-pare the indication at the steer-ing magnetic compass with the magnetic heading values shown on the NAVITWIN IV display.
At every full 10° of steering magnetic compass heading (0°, 10°, ... , 350°), note the display value.
6. Enter the observed display val-ues in the magnetic heading cal-ibration table (blank form included in [] of this manual).
7. Calculate the required correc-tion value for each heading value.
The correction value is the offset which must be applied to a given display value in order to obtain the steering magnetic compass heading.
Example:steering magnetic compass heading = 0°,display value = 0,8°,correction value = –0,8°.
0
Mag. CompassHeading
Mag. HDGDisplay
(uncalibrated)
CorrectionValue
10
MAGN
COMP 000.8
0
Mag. CompassHeading
Mag. Hdg.Display
(uncalibrated)
CorrectionValue
10
0˚
Mag. CompassHeading
Mag. Hdg.Display
(uncalibrated)
CorrectionValue
10˚
– mag. hdg. display= correction value
mag. compass hdg.
5-4 Magnetic Heading Calibration
NAVITWIN IV 056344/A
Storing the magnetic heading calibration table
1. Call up the User Setup and go to ’Magn Cal Tab | Enter Values’.
Press ENTER.
The calibration table entry screen is shown.
2. Enter the previously determined correc-tion values:
a) With the Up/Down arrow keys, select the entry (’cal. no.’) to be edited.
b) Press ENTER to confirm the cal. no./heading value1.
The cursor jumps to the ’diff.’ line.
c) Using the Up/Down and Left/Right arrow keys, enter the required cor-rection value (’diff.’).
d) Press ENTER to confirm the correction value.
e) To enter another correction value, press ENTER again.
The cursor returns to the ’cal. no.’ line.
Repeat the procedure from step a) above until all correction values have been entered.
3. Press MENU to quit the table entry screen.
1 The magnetic heading values are hard assigned to cal. numbers:Entry 00 holds the correction value for a heading of 0°, entry 01 holds the calibration value for a heading of 10° etc.
MAIN MENU
USER SETUP
MAGN CAL TAB
0˚
Mag. CompassHeading
Mag. Hdg.Display
(uncalibrated)
CorrectionValue
10˚
USE CAL TABLEENTER VALUES
CAL NO.: 00
DEL CAL:
DIFF:
HEADING: 000
NO
CAL NO.: 00
DEL CAL:
DIFF:
HEADING: 000
NO
Magnetic Heading Calibration 5-5
056344/A NAVITWIN IV
Deleting entries from the magnetic heading calibration table
When a complete new calibration is carried out, it is recommended to delete old entries from the calibration table first.
Also, if the determined correction values are comparatively small, it is generally sufficient to enter only a few values for the headings where the largest deviations occur. By deleting the correction value from a table entry, the entry is made inactive and the correction applied at the respective heading is instead calculated by interpolating between the two adjacent active entries.
To delete entries from the magnetic heading calibration table:
1. Call up the User Setup and go to ’Magn Cal Tab | Enter Values’.
Press ENTER.
The calibration table entry screen is shown.
2. Delete correction values:
a) With the Up/Down arrow keys, select the entry (’cal. no.’) to be edited.
b) Press ENTER to confirm the cal. no. Press ENTER again to move the cursor down to the ’del. cal.’ line.
c) Press the Down arrow key to select “YES”.
d) Press ENTER to confirm deletion.
e) The cursor returns to the ’cal. no.’ line.
If required, repeat the procedure from step a above to delete another value.
3. Press MENU to quit the table entry screen.
MAIN MENU
USER SETUP
MAGN CAL TAB
USE CAL TABLEENTER VALUES
CAL NO.: 00
DEL CAL:
DIFF:
HEADING: 000
NO
CAL NO.: 00
DEL CAL:
DIFF:
HEADING: 000
YES
5-6 Magnetic Heading Calibration
NAVITWIN IV 056344/A
Chapter 6: System Configuration
6.1 Service Setup Menu
The Service Setup menu provides access to the system parameters which configure the NAVITWIN IV according to the requirements of the installation at hand.
Setup Access Code
To prevent inadvertent or unauthorized changes to the system configu-ration, setup menus which are to be accessed by service personnel only are protected by access codes.
To access the Service Setup:
MAIN MENU
SERVICE SETUP
ENTER CODE
000
CONFIRM = ENTER
Go to the SERVICE SETUP
When prompted for the setup code:
Enter code "600 " Press ENTER to confirm the code..
The Service Setup sub-menu opens.SERVICE SETUP
GYRO 1GYRO 2
Call up the Main Menu
Service Setup Menu 6-1
056344/A NAVITWIN IV
Service-Setup – Overview
Figure 6-1:
Service SetupGYRO 1
INTERFACE TYP
OFF
COMPASS NAME
GYRO
NMEA NAVIGAT
PLATH BINARY
NMEA-HDT
GYRO 1
GYRO 2
GYRO 3
FOG
FOG 1
FOG 2
FOG 3
NAVISTAR
USERNAME
settings for Gyro 1 input
GYRO 2
INTERFACE TYP
OFF
COMPASS NAME
GYRO
NMEA NAVIGAT
PLATH BINARY
NMEA-HDT
GYRO 1
GYRO 2
GYRO 3
FOG
FOG 1
FOG 2
FOG 3
NAVISTAR
USERNAME
settings for Gyro 2 input
contd. on next page
SERVICE SETUP
GYRO 1GYRO 2
6-2 Service Setup Menu
NAVITWIN IV 056344/A
Figure 6-2:
Service Setup(contd.)
GYRO 3/MAGN
G3 INTERFACE
OFF
COMPASS NAME
GYRO
NMEA NAVIGAT
PLATH BINARY
NMEA-HDT
GYRO 1
GYRO 2
GYRO 3
FOG
FOG 1
FOG 2
FOG 3
NAVISTAR
USERNAME
INTERFACE TYP
settings for Gyro 3 / Magn. input
SET HDG./GPS
PROTOCOL
NMEA 4800
SET NMEA
GLL/GGA
NAVIPILOT
NMEA 9600
OFF
ZDA
VBW/VHW/VTG
MVAR RMC/RMA
HTD/HTC/ASD
settings for set hdg./GPS input
contd. on next page
contd. from previous page
MAGN. COMP.
INTERFACE TYP
OFF
HCHDG
HCHDT
COMPASS NAME
MAGNCOMP
FLUXGATE
USERNAME
HCHDM
SIN/COS
SERVICE SETUP
GYRO 3/MAGNSET HDG./GPS
Service Setup Menu 6-3
056344/A NAVITWIN IV
Figure 6-3:
Service Setup(contd.)
contd. from previous page
SERVICE SETUP
RS422 OUTP. 2PORT SETTINGSINTERNALS
PORT SETTINGS
180˚ OFFSET
settings for status input ports
GYRO 1
GYRO 2
GYRO 3
MAGN
PORT 1 MODE
EXT. DIM (+)
G1/G2 CTRL
PORT 2 MODE
EXT. DIM (-)
180˚ OFFSET
G/G3 CTRL
G/M CTRL
RS422 OUTP. 1
MAGN SELECT
HCHDG
HCHDT
HCHDM
settings for serial data output 1
STATUS SELECT
PPLAN
PPNSD
RS422 OUTP. 2
BAUDRATE
4800
19200
38400
9600
PPLAA/PPLAB/PPLAD
settings for serial data output 2
XXHDT
XXROT
MAGN SELECT
OFF
HCHDM
HCHDG
HCHDT
STATUS SELECT
OFF
PPLAN
PPNSD
contd. on next page
6-4 Service Setup Menu
NAVITWIN IV 056344/A
Figure 6-4:
Service Setup(contd.)
contd. from previous page
SERVICE SETUP
INTERNALS
FACTORY SETTINGS
LCD COLOR
system-internal settings
GYRO1 NAME
(editable string; 8 chars. max.)
reset all setup parameters to factory settings
GYRO2 NAME
(editable string; 8 chars. max.)GYRO3 NAME
(editable string; 8 chars. max.)MAGN NAME
(editable string; 8 chars. max.)
GRAY STYLE
BLUE STYLE
BLACK STYLE
INDIVIDUAL NAME
INTERNALS< BACK
Service Setup Menu 6-5
056344/A NAVITWIN IV
Service Setup – Parameters
Gyro 1
Configures the Gyro 1 input.
InterfaceTyp
Selects the interface protocol for the Gyro 1 input.
Settings: OFF
The input is disabled
NMEA-HDT
The input reads the NMEA $--HDT sentence
NMEA NAVIGAT
The input reads NMEA data from a Sperry NAVIGAT X MK 1, X MK 2, or 2100 gyrocompass
PLATH Binary
The input reads the PLATH binary data protocol
Comp. Name
Selects the displayed name for the device at the Gyro 1 input.
Settings: GYRO
GYRO 1
GYRO 2
GYRO 3
FOG
FOG 1
FOG 2
FOG 3
NAVISTAR
USERNAME (editable under Service Setup | Internals)
6-6 Service Setup Menu
NAVITWIN IV 056344/A
Gyro 2
Configures the Gyro 2 input.
InterfaceTyp
Selects the interface protocol for the Gyro 2 input.
Settings: OFF
The input is disabled
NMEA-HDT
The input reads the NMEA $--HDT sentence
NMEA NAVIGAT
The input reads NMEA data from a Sperry NAVIGAT X MK 1, X MK 2, or 2100 gyrocompass
PLATH Binary
The input reads the PLATH binary data protocol
Comp. Name
Selects the displayed name for the device at the Gyro 2 input.
Settings: GYRO
GYRO 1
GYRO 2
GYRO 3
FOG
FOG 1
FOG 2
FOG 3
NAVISTAR
USERNAME (editable under Service Setup | Internals)
Service Setup Menu 6-7
056344/A NAVITWIN IV
Gyro 3/Magn.
Configures the Gyro 3 and Magnetic Heading inputs.
G3 Interface
Configures the Gyro 3 input.
Interface Typ
Selects the interface protocol for the Gyro 3 input.
Settings: OFF
The input is disabled
NMEA-HDT
The input reads the NMEA $--HDT sentence
NMEA NAVIGAT
The input reads NMEA data from a Sperry NAV-IGAT X MK 1, X MK 2, or 2100 gyrocompass
PLATH Binary
The input reads the PLATH binary data protocol
Comp. Name
Selects the displayed name for the device at the Gyro 3 input.
Settings: GYRO
GYRO 1
GYRO 2
GYRO 3
FOG
FOG 1
FOG 2
FOG 3
NAVISTAR
USERNAME (editable under Service Setup | Internals)
6-8 Service Setup Menu
NAVITWIN IV 056344/A
Magn. Comp.
Configures the Magnetic Heading input.
Interface Typ
Selects the interface and protocol fot the magnetic heading input.
Settings: OFF
The input is disabled
HCHDG
The input input reads the NMEA $HCHDG sen-tence at the G3/MAG interface
HCHDT
The input input reads the NMEA $HCHDT sen-tence at the G3/MAG interface
HCHDM
The input reads the NMEA $HCHDM sentence at the G3/MAG interface
SIN/COS
The input reads analogue voltages from a Sperry Marine fluxgate sensor type 4863 at the analogue fluxgate interface
Comp. Name
Selects the name for the device at the magnetic heading input.
Settings: MAGNCOMP
FLUXGATE
USERNAME (editable under Service Setup | Internals)
Note When the magnetic heading is to be read from a NMEA sentence at the serial interface, the Gyro 3 input must be disabled.
Service Setup Menu 6-9
056344/A NAVITWIN IV
Set Hdg./GPS
Configures the Set Hdg./GPS input.
Protocol
Selects the interface protocol for the Set Hdg./GPS input.
Settings: OFF
The Set Hdg./GPS input is disabled
NMEA 4800
The Set Hdg./GPS input reads the NMEA data at 4800 Bd.
NMEA 9600
The Set Hdg./GPS input reads the NMEA data at 9600 Bd.
NAVIPILOT
The Set Hdg./GPS input reads the NAVIPILOT protocol
Set NMEA
Selects the evaluated input sentences in NMEA mode.
Settings: GLL/GGA
The input may receive position using the $--GLL or $--GGA sentences
ZDA
The input may receive date and time using the $--ZDA sen-tence
VBW/VHW/VTG
The input may receive speed using the $--VBW, $--VHW or$--VTG sentence
MVAR RMC/RMA
The input may receive magnetic variation using the $--RMC or $--RMA sentences
HTD/HTC/ASD
The input may receive set heading using the $--HTD, $--HTC or $AGASD sentences
6-10 Service Setup Menu
NAVITWIN IV 056344/A
RS422 Outp. 1
Configures the RS-422 output 1 and the TTL serial data outputs.
Magn. Select
Selects the output sentence for magnetic heading data.
Settings: HCHDG
Magnetic heading is sent using the NMEA $--HDG sentence with talker ID “HC”
HCHDM
Magnetic heading is sent using the NMEA $--HDM sentence with talker ID “HC”
HCHDT
Magnetic heading is sent using the NMEA $--HDT sentence with talker ID “HC”
Status Select
Selects the output sentence for nav. status data (proprietary sentences)1.
1 $PPLAN (IEC 61162-conformant) should be selected unless older peripheral equipment requires the $PPNSD sentence.
Settings: PPLAN
Nav. status data is sent using the $PPLAN sentence
PPNSD
Nav. status data is sent using the $PPNSD sentence
Service Setup Menu 6-11
056344/A NAVITWIN IV
RS422 Outp. 2
Configures the RS-422 serial data output 2.
Bd. Rate
Selects the transmission baud rate
Settings: 4800
Data is transmitted at 4800 Baud(standard according to NMEA / IEC 61162-1)
9600
Data is transmitted at 9600 Baud(non-standard)
19200
Data is transmitted at 19200 Baud(non-standard)
38400
Data is transmitted at 38400 Baud(high-speed according to IEC 61162-2)
Magn. Select
Selects the output sentence for magnetic heading data.
Settings: OFF
Magnetic heading data is not transmitted
HCHDG
Magnetic heading data is transmitted using the $--HDG sen-tence with talker ID “HC”
HCHDM
Magnetic heading data is transmitted using the $--HDM sen-tence with talker ID “HC”
HCHDT
Magnetic heading data is transmitted using the $--HDT sen-tence with talker ID “HC”
Status Select
Selects the output sentence for nav. status data (proprietary sentences)1.
1 $PPLAN (IEC 61162-conformant) should be selected unless older peripheral equipment requires the $PPNSD sentence.
Settings: OFF
Nav. status data is not transmitted
PPLAN
Nav. status data is transmitted using the $PPLAN sentence
PPNSD
Nav. status data is transmitted using the $PPNSD sentence
6-12 Service Setup Menu
NAVITWIN IV 056344/A
PPLAA/PPLAB/PPLAD
Selects whether the NAVITWIN op. data sentences are transmitted (proprietary sentences $PPLAA, $PPLAB and $PPLAD).
Settings: ON (option checked)The NAVITWIN op. data sentences are transmitted
OFF (option unchecked)The NAVITWIN op. data sentences are not transmitted
XXHDT
Selects whether true heading data is transmitted ($--HDT sentence).
Settings: ON (option checked)True heading data is transmitted using the $--HDT sen-tence with the talker ID of the currently active source(talker=“HE” if source uses PLATH format)
OFF (option unchecked)True heading data is not transmitted
XXROT
Selects whether rate of turn data is transmitted ($--ROT sentence).
Settings: ON (option checked)Rate of turn data is transmitted using the $--ROT sentence with the talker ID of the currently active source(talker=“TI” if source uses PLATH format)
OFF (option unchecked)Rate of turn data is not transmitted
Service Setup Menu 6-13
056344/A NAVITWIN IV
Port Settings
Configures the status input ports.
Port 1 Mode
Selects the function of status input port 1.
Settings: EXT. DIM (+)
The port is used for external dimming; brightness is increased one step when input contact is closed
G1/G2 CTRL
The port is used to read back the source selection status from the Switch-Over Unit. Status “G2” recognized when input contact is closed
Port 2 Mode
Selects the function of status input port 2.
Settings: EXT. DIM (-)
The port is used for external dimming; brightness is decreased one step when input contact is closed
180° OFFSET
The port is used to reverse the heading display (e.g. for use in double-ended ferries). 180° offset is applied when input contact is closed
G/G3 CTRL
The port is used to read back the source selection status from the Switch-Over Unit. Status “G3” recognized when input contact is closed
G/M CTRL1
The port is used to read back the source selection status from the Switch-Over Unit. Status “M” recognized when input contact is closed
1 For future use; required “M” status signal is not provided by Switch-Over Unit type 4932.
6-14 Service Setup Menu
NAVITWIN IV 056344/A
180° Offset
Selects the applicable heading sources for the 180° Offset function
Settings: GYRO 1
ON (option checked):Gyro 1 heading is reversed when 180° Offset is active.OFF (option unchecked):Gyro 1 heading is not reversed when 180° Offset is active.
GYRO 2
ON (option checked):Gyro 2 heading is reversed when 180° Offset is active.OFF (option unchecked):Gyro 2 heading is not reversed when 180° Offset is active
GYRO 3
ON (option checked):Gyro 3 heading is reversed when 180° Offset is active.OFF (option unchecked):Gyro 3 heading is not reversed when 180° Offset is active
MAGN
ON (option checked):Magnetic heading is reversed when 180° Offset is active.OFF (option unchecked):Magnetic heading is not reversed when 180° Offset is active
Service Setup Menu 6-15
056344/A NAVITWIN IV
Internals
Accesses system-internal parameters.
Factory Settings
Resets all configuration parameters to factory defaults.
Settings: none
Selecting “Factory Settings” and pressing the “Enter” key resets all configuration parameters to the factory defaults
Individual Name
Sets the user-editable names for the heading source inputs.
Settings: GYRO1 NAME
Sets the name for the Gyro 1 input sourceeditable string, max. 8 alphanumeric characters
GYRO2 NAME
Sets the name for the Gyro 2 input sourceeditable string, max. 8 alphanumeric characters
GYRO3 NAME
Sets the name for the Gyro 3 input sourceeditable string, max. 8 alphanumeric characters
MAGN NAME
Sets the name for the magnetic heading input sourceeditable string, max. 8 alphanumeric characters
LCD Color
Selects the display colour scheme
Settings: Gray Style
The heading source window has a gray background.
Blue Style
The heading source window has a blue background.
Black Style
The heading source window has a black background.
6-16 Service Setup Menu
NAVITWIN IV 056344/A
Chapter 7: Troubleshooting
7.1 General Troubleshooting Instructions
The NAVITWIN IV is a complex electronic device. In case of malfunction, it would neither be practical nor economical to carry out troubleshooting and servicing in the field down to the level of individual circuit compo-nents.
Unless instructed otherwise by Sperry Marine engineering, field service personnel should limit troubleshooting to:
• Visual inspection of mechanical components, the PCB and wiring.
• Continuity checks of wiring connections.
• Checks for short circuit or overload conditions or reversed polarity of the external supply power.
• Checks of the on-board supply voltages and I/O signals and data.The presence of voltages, signals and data is indicated by diagnostic LEDs on the PCB.Exact voltage levels must be checked with a voltmeter.The data content on serial I/O lines must be checked with the aid of suitable analyzing tools, such as PC-based protocol interpreters or terminal programs.
When components on the PCB, other than socketed ICs or the exchange-able system software flashboard, are assumed to cause malfunction, the complete NAVITWIN IV operating unit is to be exchanged.
WARNING Hazardous voltage is present inside the NAVITWIN IV.
Danger of electrical shock or burn when the CCFL inverter connections
are touched.
Disconnect power before opening the device.
When servicing the device without the back cover installed, do not touch
the PCB while power is applied to the board.
CAUTION The NAVITWIN IV contains electrostatic sensitive components.
Electrostatic discharge may permanently damage components.
When servicing the NAVITWIN IV, take precautions to prevent electro-static discharge. Avoid touching any of the electronic circuitry.
General Troubleshooting Instructions 7-1
056344/A NAVITWIN IV
7.2 Location of Parts on the NAVITWIN IV PCB
Figure 7-1 below shows the locations of exchangeable components, connectors and diagnostic LED indicators on the NAVITWIN IV PCB.
Figure 7-1:
location of parts on theNAVITWIN IV PCB
CR 15
CR 13
CR 21
CR 16
CR 29
CR 34
J 6
CR 35
CR 36
CR 37
CR 49
CR 50
CR 52
CR 53
CR 54
CR 45
CR 46
J 1
CR 30
CR 32
CR 48
CR 58
CR 59
CR 57
CR 33
Flashboard
J 4
J 2
IC 4
WARNINGdanger of electrical shock
or burn when CCFL inverter
connections are touched
7-2 Location of Parts on the NAVITWIN IV PCB
NAVITWIN IV 056344/A
Exchangeable Components
Table 7-1:
Exchangeable compo-nents on the
NAVITWIN IV PCB
Connectors
Table 7-2:
Connectors on theNAVITWIN IV PCB
Part Function Stock No.
Flash-board
Flahsboard (flash-memory card),pre-programmed with system software
020684-0000-000
IC 4 quad RS-422 output driver IC;drives serial data RS-422 outputs 1 and 2
046485-0000-000
Function
J 1 Socket for buzzer hi/lo jumper1;
1 J1 must be placed across pins 1 and 2 (buzzer hi) in normal operation. Placing J1 across pins 2 and 3 (buzzer lo) is permitted only to tempo-rarily silence buzzer during service.
J 2 RS-232 service interface connector
J 4 Socket for exchangeable system software flashboard
J 6 50-pin Sub-D I/O connector
Location of Parts on the NAVITWIN IV PCB 7-3
056344/A NAVITWIN IV
Diagnostic LEDs
As an aid in troubleshooting, a number of diagnostic LED indicators are provided on the NAVITWIN IV PCB. These indicate the presence of sup-ply voltages, activities on the serial data I/O lines and the current states of the status I/O ports.
Table 7-3:
Diagnostic LEDsLED Colour Indication
CR 15 green flashes with activity on Tx line, ser. data TTL
CR 16 green flashes with activity on Tx line, ser. data RS-422 2
CR 21 green flashes with activity on Tx line, ser. data RS-422 1
CR 29 green lit when +3.3 VDC (Vcc) on-board supply present
CR 30 green lit when +5 VDC on-board supply present
CR 32 green lit when –12 VDC on-board supply present
CR 33 green lit when +12 VDC on-board supply present
CR 34 green lit when status input closed, Ext. Dim+
CR 35 green lit when status input closed, Offset 180°/ Ext. Dim-
CR 36 green lit when status input closed, Auto/Man
CR 37 green lit when status input closed, Mute
CR 45 green flashes with activity on Rx line, Gyro 2 input
CR 46 green flashes with activity on Rx line, Gyro 1 input
CR 48 green lit when status output active, G1/G2
CR 49 green lit when relay attracted, K1, watch alarm trigger
CR 50 green lit when relay attracted, K2, off heading alarm
CR 52 green lit when relay attracted, K3, pwr. failure/gen. alarm
CR 53 green flashes with activity on Rx line, Gyro 3/Mag input
CR 54 green flashes with activity on Rx line, Auto/GPS input
CR 57 green lit when status output active, G/G3
CR 58 green lit when status output active, G/M
CR 59 green lit when relay attracted, K4, heading diff. alarm
7-4 Location of Parts on the NAVITWIN IV PCB
NAVITWIN IV 056344/A
Chapter 8: Corrective Maintenance
The NAVITWIN IV is generally not field-serviceable on the component level. Defective devices must be sent back to Sperry Marine for repair.
The only corrective maintenance procedures which may be performed by field service personnel are the exchange of the system software and the replacement of the serial RS-422 output driver IC.
8.1 Exchanging the System Software
Downloading Software from the Flashboard
The NAVITWIN IV keeps two separate copies of the system software, one in an onboard flash memory and the other on the exchangeable software flashboard 20684.
The system always boots up from the onboard memory. Should, at power-up, a different software version be found on the flashboard than is currently stored onboard, the software from the flashboard is auto-matically copied to the onboard memory and the system is restarted.
This allows both to upgrade to newer and to downgrade to previous releases by simply exchanging the flashboard.
WARNING Hazardous voltage is present inside the NAVITWIN IV.
Danger of electrical shock or burn when the CCFL inverter connections
are touched.
Disconnect power before opening the device.
When servicing the device without the back cover installed, do not touch
the PCB while power is applied to the board.
CAUTION The NAVITWIN IV contains electrostatic sensitive components.
Electrostatic discharge may permanently damage components.
When servicing the NAVITWIN IV, take precautions to prevent electro-static discharge. Avoid touching any of the electronic circuitry.
CAUTION It cannot be guaranteed that parameters settings in the User and Setup menus and the entries made in the Magnetic Compass Calibration table are left intact during the software download.Before exchanging the flashboard, record all parameter settings to be able to re-enter them manually, if required.
Exchanging the System Software 8-1
056344/A NAVITWIN IV
Exchanging the Flashboard
1. Disconnect the 50-pin plug connector from the back of the NAVITWIN IV.
2. In case of a console or frame-mounted device, unmount the NAVITWIN IV from the console and remove the back cover.In case of a device in housing with bracket, unscrew the back cover and remove the NAVITWIN IV insert from the housing.
3. Place the NAVITWIN IV insert face-down on a flat, clean surface.
4. Carefully remove the plastic pin which secures the flashboard to the main PCB.
5. Pull the old flashboard out of its socket, making sure to touch it at the edges only.
6. Insert the new flashboard into the socket.
7. Secure the flashboard with the plastic pin.
8. In case of a console or frame-mounted device, reattach the back cover and mount the NAVITWIN IV in the console.In case of a device in housing with bracket, insert the NAVITWIN IV in the housing and screw on the back cover.
9. Connect and secure the 50-pin plug connector to the back of the housing.
10. Power-up the NAVITWIN IV.
11. The NAVITWIN IV shows a blank display at maximum brightness for several minutes. This indi-cates that the software is being downloaded from the flash-board to the onboard memory.
CAUTION Do not disconnect power or otherwise interrupt the power-up process after an exchange of the flashboard.
8-2 Exchanging the System Software
NAVITWIN IV 056344/A
Uploading Software via the Service Interface
The system software may also be uploaded from a PC or laptop via the RS-232 service interface on the NAVITWIN IV PCB.
At the time of writing of this manual, however, an upload program for field service use is not yet available. Sperry Marine will issue an official Service Bulletin as soon as such a program becomes available.
8.2 Replacing the RS-422 Output Driver IC
The RS-422 output driver, IC 4, is a socketed 16-pin DIL chip. If failure or malfunction of the RS-422 outputs is attributed to a defective driver IC, the chip can easily be replaced against a new one.
The driver IC is a standard quadruple RS-422 line driver (MC3487), avail-able from Sperry Marine Hamburg as part no. 46485.
12. When the software download is complete, the NAVITWIN IV automatically restarts.
13. If a “EEPROM DATA INVALID” message is shown, the new soft-ware requires the setup mem-ory to be restored to factory settings. Press the ACK key to continue the power-up sequence.
14. Check the parameter settings in the User and Service Setup menus and the entries in the magnetic heading calibration table.Re-enter any settings which may not have been preserved.
Note If the “EEPROM DATA INVALID” message was shown during the power-up, the parameters settings in all menues and the entries in the magnetic heading calibration table will have been restored to factory settings.All parameters in the User and Service setups, the Manual settings and the magnetic heading calibration table will have to be re-entered as required for the given system.
Replacing the RS-422 Output Driver IC 8-3
056344/A NAVITWIN IV
8-4 Replacing the RS-422 Output Driver IC
NAVITWIN IV 056344/A
Appendix A: Setup and Configuration Tables
The following tables (blank forms) are appended to this manual:
Designation Drawing No.
NAVITWIN IVPreferred Operational Settings
4994-0125-01
NAVITWIN IVSetup Table
4994-0125-02
NAVITWIN IVMagnetic Compass Calibration Table
4994-0125-03
Note After installation of the NAVITWIN IV, please return a filled-out copy of the Setup Table to Sperry Marine for inclusion in the ship’s file.When permanent changes are made to the system configuration, please return an updated copy of the Setup Table to Sperry Marine.
056344/A NAVITWIN IV
Northrop Grumman Sperry Marine B.V. (Representative Office)Woltmanstr. 19, D-20097 Hamburg, Germany
Tel.: +49-40-299 00-0, Fax: +49-40-299 00-298, E-mail: [email protected]
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Preferred Operational Settings
Vessel:
IMO No.:
Hull No.:
Shipyard:
Service Station / Installer: Date / Signature:
/
Note Make copies of this form to note the appropriate settings in the Manual Settings and User Setups for normal operation of the equipment.In general, automatic data input modes should be chosen in preference of manual input, wherever possible.
Monitoring Functions
Off Hdg. Alarm Mode:
OFF AUTO MAN
Threshold: °
Hdg. Diff. Alarm Sources:
OFF GY1/GY2 GY1/GY3 GY1/MAGN
GY2/GY3 GY2/MAGN GY3/MAGN
Threshold: °
Manual Settings
Speed Mode AUTO AUTO2 MAN
Position Mode AUTO AUTO2 MAN
Mag Variation AUTO
NAVIPRINT*
* NAVIPRINT settings not implemented in current software. Printer settings must be entered at the compass(es) directly.
ON Paper Speed 60 mm/h
150 mm/h
600 mm/h
Heading
±30°
±180°
Rudder ±9°
±45°
±70°
OFF
Rate of TurnTime Constant: s Max. ROT alarm: °/min.
North Sp. Err. Corr. Err. Corr.
User Setup
Date/Time Mode AUTO
Magn. Cal. Tab. Use Cal. Tab.
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Setup Table
Vessel:
IMO No.:
Hull No.:
Shipyard:
Service Station / Installer: Date / Signature:
/
Note After installation of the NAVITWIN IV, please return a filled-out copy of the Setup Table to Sperry Marine for inclusion in the ship’s file.When permanent changes are made to the system configuration, please return an updated copy of the Setup Table to Sperry Marine.
Gyro 1
Interface Type OFF NMEA-HDT NMEA
NAVIGAT
PLATH
BINARY
Compass Name GYRO
FOG
NAVISTAR
GYRO 1
FOG 1
USERNAME
GYRO 2
FOG 2
GYRO 3
FOG 3
Gyro 2
Interface Type OFF NMEA-HDT NMEA
NAVIGAT
PLATH
BINARY
Compass Name GYRO
FOG
NAVISTAR
GYRO 1
FOG 1
USERNAME
GYRO 2
FOG 2
GYRO 3
FOG 3
Gyro 3/Magn
- G3 Interface
Interface Type OFF NMEA-HDT NMEA
NAVIGAT
PLATH
BINARY
Compass Name GYRO
FOG
NAVISTAR
GYRO 1
FOG 1
USERNAME
GYRO 2
FOG 2
GYRO 3
FOG 3
- Magn. Comp.
Interface Type OFF HCHDG HCHDT HCHDM
SIN/COS
Compass Name MAGNCOMP FLUXGATE USERNAME
Set Hdg./GPS
Protocol OFF NMEA 4800 NMEA 9600 NAVIPILOT
Set NMEA GLL/GGA
HTD/HTC/
ASD
ZDA VBW/VHW
VTG
MVAR RMC
RMA
Northrop Grumman Sperry Marine B.V. (Representative Office)Woltmanstr. 19, D-20097 Hamburg, Germany
Tel.: +49-40-299 00-0, Fax: +49-40-299 00-298, E-mail: [email protected]
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RS422 Outp. 1
Magn. Select HCHDG HCHDM HCHDT
Status Select PPLAN PPNSD
RS422 Outp. 2
Baudrate 4800 9600 19200 38400
Magn. Select OFF HCHDG HCHDM HCHDT
Status Select OFF PPLAN PPNSD
Status Data Out PPLAA/PPLAB/PPLAD
HDT Out XXHDT
ROT Out XXROT
Port Settings
Port 1 Mode Ext. Dim (+) G/G2 Ctrl.
Port 2 Mode Ext. Dim (-) 180° Offset G/G3 Ctrl. G/M Ctrl.
180° Offset GYRO 1 GYRO 2 GYRO 3 MAGN
Internals
Individ. NameGYRO1 NAME: GYRO2 NAME:
GYRO3 NAME: MAGN NAME:
LCD Color GRAY STYLE BLUE STYLE BLACK STYLE
Northrop Grumman Sperry Marine B.V. (Representative Office)Woltmanstr. 19, D-20097 Hamburg, Germany
Tel.: +49-40-299 00-0, Fax: +49-40-299 00-298, E-mail: [email protected]
Northrop Grumman Sperry Marine B.V. (Representative Office)Woltmanstr. 19, D-20097 Hamburg, Germany
Tel.: +49-40-299 00-0, Fax: +49-40-299 00-298, E-mail: [email protected]
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NAVITWIN IV
Magnetic Compass Calibration
Table
Vessel:
IMO No.:
Hull No.:
Shipyard:
Service Station / Installer: Date / Signature:
/
Magnetic
Compass Hdg.
Magnetic
Hdg. Display
(uncalibrated)
Correction ValueMagnetic
Compass Hdg.
Magnetic
Hdg. Display
(uncalibrated)
Correction Value
NAVITWIN IV 056344/A
Appendix B: Drawings
The following drawings are appended to this manual:
Designation Drawing No.
Dimension Drawing:Heading Management System NAVITWIN IVControl and Display Unit in Housing with Bracket
4994-0112-01
Dimension Drawing:Heading Management System NAVITWIN IVControl and Display Unit
4994-0112-02
Dimension Drawing:Console Frame Layout(NAVITWIN IV in console frame, PN 79361)
0031-0112-71
Dimension Drawing:Console Cutout(cutout dimensions 3x1 frame)
0031-0112-02
Wiring Diagram:NAVITWIN IV
4994-0115-01
Cable with D-Plug 4994-2000-00
Note All appended drawings are revision-controlled separately at Sperry Marine. In case of doubt, verify the current revision status of the draw-ings with Sperry Marine. This manual’s revision status does not change when the revision of an appended drawing changes.
056344/A NAVITWIN IV