atim
DESCRIPTION
ATiM. Spécialiste en étude et développement de produits de radiocommunication www.atim.com. ARM-SE « A dvanced R adio M odem S erial & E thernet ». Agenda. Morning : Theory - Operating Principles Radio Notions Serial Links Notions Network Notions ARM-SE Description - PowerPoint PPT PresentationTRANSCRIPT
ATiM
Spécialiste en étude et développement de produits
de radiocommunicationwww.atim.com
ARM-SE
« Advanced Radio Modem Serial & Ethernet »
ATIM: le spécialiste de la radiocommunication 2
o Morning:o Theory - Operating Principles
• Radio Notions• Serial Links Notions• Network Notions
o ARM-SE• Description• Operating Modes• Radio Settings• Extras
o Afternoon:o Workshop
ATIM: le spécialiste de la radiocommunication 3
Agenda
Radio NotionsTheory – Operating Principles
ATIM: le spécialiste de la radiocommunication 4
o Basic Communication Systemo Transmitter and Receiver
RF Basics
ATIM: le spécialiste de la radiocommunication 5
Transmitter Receiver
Basic Radio Communication Systemo Transmitter and Receivero Transmitting Antenna
RF Basics
ATIM: le spécialiste de la radiocommunication 6
Transmitter ReceiverAntenna 1
Basic Radio Communication Systemo Transmitter and Receivero Transmitting Antennao Receiving Antenna
RF Basics
ATIM: le spécialiste de la radiocommunication 7
Transmitter ReceiverAntenna 1 Antenna 2
Basic Communication Systemo Transmitter and Receivero Transmitting Antennao Receiving Antennao Environment
RF Basics
ATIM: le spécialiste de la radiocommunication 8
Transmitter ReceiverAntenna 1 Antenna 2
Environment
Basic Communication SystemRF Basics
ATIM: le spécialiste de la radiocommunication 9
Transmitter ReceiverAntenna 1 Antenna 2
Environment
Transmitter ReceiverAntenna 1 Antenna 2
Environment
RF Basics
ATIM: le spécialiste de la radiocommunication 10
o Maximizing Range
RF Basics
ATIM: le spécialiste de la radiocommunication 11
Transmitter ReceiverAntenna 1 Antenna 2
Maximizing Rangeo Increase Transmitter (TX) Power
• Government Regulated• Low-powered Applications
RF Essentials
ATIM: le spécialiste de la radiocommunication 12
Increase Power ReceiverAntenna 1 Antenna 2
Maximizing Rangeo Increase Transmitter (TX) Powero Increase Receiver (RX) Sensitivity
• Specified in dBm (more of this later)
RF Essentials
ATIM: le spécialiste de la radiocommunication 13
IncreasePower
ImproveRX Sensitivity
IncreaseGain
IncreaseGain
Maximizing Rangeo Increase Transmitter (TX) Powero Increase Receiver (RX) Sensitivityo Increase Antenna Gain
• More gain equates with more focusing of energy• Antenna cables should be as short as possible
RF Essentials
ATIM: le spécialiste de la radiocommunication 14
Transmitting AntennaFocused energy
Receiver AntennaFocused energy
o Maximizing Rangeo Increase Transmitter (TX) Powero Improve Receiver (RX) Sensitivityo Increase Antenna Gaino Clear the Environment of obstructions
• Visual (Linear) line-of-sight vs. RF (Radio) line-of-sight
RF Essentials
ATIM: le spécialiste de la radiocommunication 15
IncreasePower
ImproveRX Sensitivity
IncreaseGain
IncreaseGain
Clear theEnvironment
o Fresnel Zoneo Football-shaped path
RF Essentials
ATIM: le spécialiste de la radiocommunication 16
FresnelZone
Site A
Site B
d2
d1
Radius of n th Fresnel Zone given by:
21
21
dd
ddnrn+
=l
o Fresnel Zone diameter depends upon Wavelength, and Distances from the sites along axis
o For minimum Diffraction Loss, clearance of at least 0.6F1+ 3m is required
RF Essentials
2nd*
1st*
3rd*
* Fresnel Zones
o Fresnel Zoneo Football-shaped patho Acceptable = 60% of Zone 1 + 3 meterso Raise antennas to help clear the zone
RF Essentials
ATIM: le spécialiste de la radiocommunication 18
o Fresnel Zone Diameters
RF Essentials
ATIM: le spécialiste de la radiocommunication 19
RangeDistance
868 MHz ModemsRequired Fresnel Zone
Radius1 m 0,29 m
3 m 0,51 m
10 m 0,93 m
30 m 1,61 m
100 m 2,94 m
300 m 5,09 m
1600 m 11,76 m
8000 m 26,29 m
16000 m 37,18 m
o RF starts with AC (Alternating current)
o The antenna converts radio frequency electrical energy fed to it (via the transmission line) to an electromagnetic wave propagated into space.
RF Terminology
ATIM: le spécialiste de la radiocommunication 20
o Wavelength is the distance between identical points in the adjacent cycles of a waveform. In wireless systems, this length is usually specified in meters, centimeters, or millimeters
o The size of the wavelength varies depending on the frequency of the signal. Generally speaking, the higher the frequency the smaller the wavelength.
RF Terminology
ATIM: le spécialiste de la radiocommunication 21
Wavelength = 3 x 108
f (frequency in Hz) 868MHz -> 34.5 cm
o Frequencyo Measured in Hz (Hertz)o With appropriate multiplier
• kHz – Kilohertz (Thousands of Hertz)• MHz – Megahertz (Millions of Hertz)• GHz – Gigahertz (Billions of Hertz)
o Frequency Classificationo VLF – Very Low Frequency 10-30kHzo LF – Low Frequency 30-300kHzo MF – Medium Frequency 300-3000kHzo HF – High Frequency 3-30MHzo VHF – Very High Frequency 30-300MHzo UHF – Ultra High Frequency 300-3000MHzo SHF – Super High Frequency 3-30GHzo EHF – Extremely High Frequency 30-300GHz
RF Terminology
ATIM: le spécialiste de la radiocommunication 22
o Tx is short for “Transmit”o All radios have a certain level or Tx power that the radio generates at the
RF interface. This power is calculated as the amount of energy given across a defined bandwidth and is usually measured in one of two units:
1. dBm – a relative power level referencing 1 milliwatt2. W – a linear power level referencing Watts
dBm = 10 x log[Power in Watts / 0.001W]W = 0.001 x 10[Power in dBm / 10 dBm]
RF Terminology
ATIM: le spécialiste de la radiocommunication 23
o Rx is short for “Receive”o All radios also have a certain ‘point of no return’, where if they receive a
signal less than the stated Rx Sensitivity, the radio will not be able to ‘see’ the data.
o This is also stated in dBm or W.
RF Terminology
ATIM: le spécialiste de la radiocommunication 24
o In a wireless system, antennas are used to convert electrical waves into electromagnetic waves. The amount of energy the antenna can ‘boost’ the sent and received signal by is referred to as the antennas Gain.
o Antenna gain is measured in:
1. dBi: relative to an isotropic radiator2. dBd: relative to a dipole radiator
0 dBd = 2.15 dBi
RF Terminology
ATIM: le spécialiste de la radiocommunication 25
o Omni-Directionalo Shorter Distanceso Greater Coverage
o Directionalo Greater Distanceso Area coverage sacrificed
RF Terminology
ATIM: le spécialiste de la radiocommunication 26
o Link Budget CalculationsRF Calculations
ATIM: le spécialiste de la radiocommunication 27
– Path Loss (dB)
– Field Factor (dB)
– Antenna Gain– (dBi)
– Cable Losses– (dB)
– Connector– Losses
– (dB)
– Connector– Losses
– (dB)– Cable Losses
– (dB)
– A – B
– Received Signal Level – (dBm) = Tx Output (dBm) - Path– Loss(dB) - Field Factor (dB) + Total Antenna Gains (dB) - Total– Cable Losses (dB) - Total Connector Losses (dB)
– Antenna Gain– (dBi)
– Tx Output (dBm)– Tx Output (dBm)
o ARM-SE Example
RF Calculations
ATIM: le spécialiste de la radiocommunication 28
5 mW 7 dBm
25 mW 14 dBm
500 mW 27 dBm
TRANSMISSION POWER
0,5km -81 dBm
1km -91 dBm
2 km -97 dBm
ATTENUATION BY AIR
3 km -101 dBm
4 km -103 dBm
5 km -105 dBm
6 km -107dBm
7 km -108 dBm
9600 Bauds -110 dBm
19200 Bauds -107 dBm
38400 Bauds -104 dBm
RECEIVER SENSITIVITY
76800 Bauds -101 dBm
Table 3
Table 4
Table 5
4800 Bauds -112 dBm
o Regulatory Bodieso FCC (United States)o IC (Canada)o ETSI (Europe, some APAC)o C-Tick (Australia)o Telec (Japan)o Anatel (Brazil)
RF Regulations
ATIM: le spécialiste de la radiocommunication 29
RF Regulations
ATIM: le spécialiste de la radiocommunication 30
o Modulateo Insert data signal into a carrier wave.o Digital data. 0 or 1
o RF Modulationo Transmitting a signal within a carrier frequency by blending an
alternating frequency or amplitude onto the carrier wave
RF Modulation
ATIM: le spécialiste de la radiocommunication 31
Data
Carrier
Modulated Signal
Serial Link NotionsTheory – Operating Principles
ATIM: le spécialiste de la radiocommunication 32
o Architecturally RS-232 is a bi-directional point to point link.o RS-232 is a popular communications interface for connecting modems and
data acquisition devices (i.e. GPS receivers, electronic balances, data loggers, ...) to computers.
o RS-232 can be plugged straight into the computer’s serial port (know as COM or Comm port).
Serial Links - RS-232
ATIM: le spécialiste de la radiocommunication 33
o Two independent channels are established for two-way (full-duplex) communications.
o RS-232 can also carry additional signals used for flow control (RTS, CTS) and modem control (DCD, DTR, DSR, RI).
Serial Links - RS-232
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o Unbalanced Line Driverso Each signal appears on the interface connector as a voltage with
reference to a signal ground.o The “idle” state (MARK) has the signal level negative with respect to
common whereas the active state (SPACE) has the signal level positive respest to the same reference.
Serial Links - RS-232
ATIM: le spécialiste de la radiocommunication 35
o How fast can RS-232 be?o The maximum speed, according to the standard, is 20kbit/s.
However, modern equipment can operate much faster than this.o The length of the cable also plays a part in maximum speed.
The longer the cable the slower the speed at which you can obtain accurate results.A large wire capacitance and inductance limits the maximum length of the cable and/or the maximum speed; Moreover higher is the capacitance of the cable higer is the interference between two adjacent signal wire.15m @ max baudrate is commonly quoted as the maximum distance.
Serial Links - RS-232
ATIM: le spécialiste de la radiocommunication 36
o SW Settingso One byte of async data has:o Start Bit = 1 (always)o Data Bits = 8 (or 7)
Serial Links - RS-232
ATIM: le spécialiste de la radiocommunication 37
o Stop bits = 1 (or 2)o Parity = NONE (or EVEN or ODD)
+ 25
- 25
o What is RS-485?o RS-485 is a EIA standard interface which is very common in the data
acquisition worldo RS-485 provides balanced transmission line which also can be shared in
Multidrop mode.o It allows high data rates communications over long distances in real
world environments.o How fast can RS-485 be?o RS-485 was designed for greater distance and higher baudrates than RS-
232.o According to the standard, 100kbit/s is the maximum speed and
distance up to 4000 feet (1200 meters) can be achieved.
Serial Links - RS-485
ATIM: le spécialiste de la radiocommunication 38
o Balanced Line Driverso Voltage produced by the driver appears across a pair of signal wires that
transmit only one signal. Both wires are driven opposite.o RS-485 driver has always the “Enable” direction control signal.o Differential system provides noise immunity, because much of the
common mode signal can be rejected by the receiver. So ground shifts and induced noise signals can be nullified.
Serial Links - RS-485
ATIM: le spécialiste de la radiocommunication 39
o RS-485 Networko RS-485 provides Half-Duplex, Multidrop communications over a single
twisted pair cable.
Serial Links - RS-485
ATIM: le spécialiste de la radiocommunication 40
MASTER SLAVE-1
SLAVE-2 SLAVE-3
o The standard specifies up to 32 drivers and 32 receivers can share a multidrop network
o Terminator resistors avoid reflected signal
o RS-485 Full-duplexo Potentially RS-485 interface can also use 4-wires to comunicate in
multidrop mode but...
Serial Links - RS-485
ATIM: le spécialiste de la radiocommunication 41
TX
ENABLE
RX
TX485+TX485-
RX485+
RX485-485GND
TX
ENABLE
RX
Other device
o RS-232 vs RS-485
o The architectural difference between RS-232 and RS-485 is that 232 is a bi-directional point to point link, whereas 485 is a single channel bus.
o Electrically, each 232 signal uses a single wire with symmetric voltages about a common ground wire. 485 uses two wires to carry the single signal differentially.
o The big difference to the software is that only one device on a 485 bus can transmit at a time, whilst there is not similar limitation on RS232 because is a peer-to-peer link .
Serial Links
ATIM: le spécialiste de la radiocommunication 42
Network NotionsTheory – Operating Principles
ATIM: le spécialiste de la radiocommunication 43
o Internet is a global system of interconnected computer networks that use the standard Internet Protocol Suite (TCP/IP)
Network Notions
ATIM: le spécialiste de la radiocommunication 44
o TCP/IP stack is base in the OSI model
Network Notions
ATIM: le spécialiste de la radiocommunication 45
PHYSIQUE
LIAISON
RESEAU
TRANSPORT
SESSION
PRESENTATION
APPLICATION76
5
4
3
2
1
MODELE OSI MODELE TCP/IP
ACCES RESEAU
INTERNET
TRANSPORT
APPLICATION
A
B
C
D
Different network types interconnected. = don’t depend of low level layers.
o Encapsulation:
Network Notions – TCP/IP
ATIM: le spécialiste de la radiocommunication 46
APPLICATION
TRANSPORT
INTERNET
ACCES RESEAU
Message
Segment
Datagramme
Trame
Réseau
Client Server
Client <->MasterServer <-> Slave
Successive encapsulation of datas from application to physical network access.
o Physical Addressing:o NIC (Network Interface Controller)= address of low level layerso Each NIC has a MAC address (6 bytes)
o Address Resolution:o The communication between 2 equipments starts by a MAC resolution address.o Example: arp = MAC resolution from an IP addresso Needs a frame « all access » for query everyone and wait for replyo Frame « all access» has @MAC dest « Broadcast » (FF-FF-FF-FF-FF-FF)
Network Notions – TCP/IP
ATIM: le spécialiste de la radiocommunication 47
o Physical & standard layers:
Network Notions – TCP/IP
ATIM: le spécialiste de la radiocommunication 48
APPLICATION
TRANSPORT
INTERNET
802.2 LOGICAL LINK CONTROL (LLC)
802.3MAC
802.5MAC
802.11 MAC
802.3 PHY
802.5 PHY
802.11FHSS PHY
802.11DSSS PHY
802.11aOFDM PHY
802.11bHR/DSSS PHY
GFSK PHY
802.3 802.5 802.11 ARM802.3MAC
TokenRing
CSMA/CD Wireless
PHY: Radio, Cable, Optical fibers
MAC: (CSMA/CD, CSMA/CA, Token ring, RTS/CTS etc...)
ATIM: le spécialiste de la radiocommunication 49
o Management of the low layers By ARM-SE:
APPLICATION
TRANSPORT
INTERNET
ACCES RESEAU
ARM
MAC
PHY
MAC
PHY
802.3
=My @IP ?
HTTP MODBUS TCPSERVER
BOOTLOADER
@MACFILTER
APPLICATION
TRANSPORT
INTERNET
802.2 LOGICAL LINK CONTROL (LLC)
802.3MAC
802.5MAC
802.11 MAC
802.3 PHY
802.5 PHY
802.11FHSS PHY
802.11DSSS PHY
802.11aOFDM PHY
802.11bHR/DSSS PHY
GFSK PHY
802.3 802.5 802.11 ARM802.3MAC
Network Notions
ATIM: le spécialiste de la radiocommunication 50
APPLICATION
TRANSPORT
INTERNET
ACCES RESEAU
ARM
MAC
PHY
MAC
PHY
802.3
=My @IP ?
HTTP MODBUS TCPSERVER
BOOTLOADER
@MACFILTER
Applications managed by ARM-SE server:HTTP: embedded web pagesModBusTCP Server: decapsulate ModBus RTU
messageBootloader: Firmware upgrade service
Destination MAC addresses filtering(to reduce the wireless Ethernet trafic)
Except Broadcast addressing !
DescriptionARM-SE
ATIM: le spécialiste de la radiocommunication 51
o Operating modes:o Ethernet, ModBus TCP Server & Serial
o Interfaceso RS232, RS485, Ethernet interfaces
o Inputs/Outputo 1 digital input & 1 digital output
ARM-SE Description
ATIM: le spécialiste de la radiocommunication 52
ARM-SE Description
ATIM: le spécialiste de la radiocommunication 53
Antenna Connector
(SMA female)
RS232 port
RJ45 Ethernet
RS485 port
Power SupplyInput/Output
LED indicators Rx, Tx, In, Out, Sys, On
Thumb wheel 16 channels
(rear side)
4 Dip switches for test mode and RS485 termination (rear side)
ARM-SE Description
ATIM: le spécialiste de la radiocommunication 54
Désactivé ↔ Activé1 : Mode test2 : Pull-up 2.7K3 : Pull-down 2.7K4 : Terminaison 120Ω
Selection of radio channel ortest number
DIP Switch
Thumb Wheel
o Configuration viao Webpageso AT Commandso SNMP (Firmware 10.2)
ARM-SE Description
ATIM: le spécialiste de la radiocommunication 55
Operating ModesARM-SE
ATIM: le spécialiste de la radiocommunication 56
ARM-SE Operating Modes
ATIM: le spécialiste de la radiocommunication 57
SERIAL
ETHERNET
GATEWAY
OPERATINGMODE
TRANSPARENT
SECURIZED
MIRROR
MODBUS
RS 485
RS 232
ETHERNET
MAC
MAC
PHY
INTERNALREGISTERS
EXTENSIONCARDS
TRANSPARENT
AT COMMANDSWEB PAGES
MODBUS RTUMODBUS TCP
o Selection of operating mode :
ARM-SE Operating Modes
ATIM: le spécialiste de la radiocommunication 58
o Ethernet mode:o ARM-SE connected to the « NIC » with a 10 Base T cableo The « NIC » can talk anytime o Communication reliability guaranteed by :
• ACK wireless headers and repeat after randomized time• Wireless RTS/CTS (depends of the configuration)
o Datarate difference compensated by control algorithms , « Transport » layer (Typically TCP)• -> avoid flow congestion and traffic jam.
ARM-SE Operating Modes
ATIM: le spécialiste de la radiocommunication 59
o Ethernet mode:1. Point to Point (case n°1):
ARM-SE Operating Modes
ATIM: le spécialiste de la radiocommunication 60
Easy operating mode, default setup
o Ethernet mode:1. Point to Point (case n°2):
ARM-SE Operating Modes
ATIM: le spécialiste de la radiocommunication 61
Almost similar than case n°1 because the switch isolate the communications from its ports.
o Ethernet mode:1. Point to Point (case n°3):
ARM-SE Operating Modes
ATIM: le spécialiste de la radiocommunication 62
Operation uselessly disturbed by repeated messages from the hub
o Ethernet mode:Filters setup on destination MAC addresses :
ARM-SE Operating Modes
ATIM: le spécialiste de la radiocommunication 63
o Ethernet mode:2. Point to Multipoints
ARM-SE Operating Modes
ATIM: le spécialiste de la radiocommunication 64
Star Network topology:Clients can speak onlywith Access Point.
Bandwith activelyemployed.
ARM-SE
AB
ENDPOINT 2
ARM-SE
ENDPOINT 1
ENDPOINT 6
ENDPOINT 5
A
ARM-SE
AC
ENDPOINT 3
ARM-SE
AD
ENDPOINT 4
o ModBus TCP Server mode:
o Identical to a ModBus slave solicited by a master/client device.o Allow communication between an Ethernet device with ModBus TCP protocol and
ModBus RTU slaves.
ARM-SE Operating Modes
ATIM: le spécialiste de la radiocommunication 65
o ModBus TCP Server mode:
ARM-SE Operating Modes
ATIM: le spécialiste de la radiocommunication 66
o ModBus TCP Server mode:
o ModBus Environment :
ARM-SE Operating Modes
ATIM: le spécialiste de la radiocommunication 67
Communication between devices connected to different kinds of buses
Good for read/write of Inputs / Outputs
o ModBus TCP Server mode:
o MODBUS Reminder• The request:
• The response:
In case of error, the data include an exception code indicating the error nb.
ARM-SE Operating Modes
ATIM: le spécialiste de la radiocommunication 68
o ModBus TCP Server mode:
o MODBUS Reminder• Function codes:
ARM-SE Operating Modes
ATIM: le spécialiste de la radiocommunication 69
o ModBus TCP Server mode:
o MODBUS Reminder• ModBus messages:
• Modbus RTU
• Modbus TCP
ARM-SE Operating Modes
ATIM: le spécialiste de la radiocommunication 70
o ModBus TCP Server mode:o Use of the ModBus TCP/ModBus RTU gateway:
• ARM-SE Server ModBus TCP decapsulate the message and send it to different possible targets.
ARM-SE Operating Modes
ATIM: le spécialiste de la radiocommunication 71
o ModBus TCP Server mode:o Limited number of client connections on the server (need resources):
• Max 2 client applications (or 2 clients). • Each client use a different port (TCP 502: default port for ModBus TCP protocol)
ARM-SE Operating Modes
ATIM: le spécialiste de la radiocommunication 72
o ModBus TCP Server mode:o Affectation of the TCP ports according to the target
• The TCP port forwards the connection to the target.
ARM-SE Operating Modes
ATIM: le spécialiste de la radiocommunication 73
PORT 80 PORT 502 PORT 503
TARGETS
MODB
US TC
P SE
RVER
H
TTP
IP
TCP
@IP Y
o ModBus TCP Server mode:o Query of the targets :
ARM-SE Operating Modes
ATIM: le spécialiste de la radiocommunication 74
X
ARM-SE
RS485
RS232MODBUSTCP RTU
3
12
R
ADIO
CHANNEL Z
ARM-DAARM-D
ARM-LP
R
ADIO
CHA
NNEL
Y
ARM-LPARM-LP 3
SERVER@IP B
MODBUS TCPCONSOLE
TCP PORT: 502
MODBUS TCPCONSOLE
TCP PORT: 503
CLIENTS@IP A
With different radio channelsIs possible to communicate
with different cluster of slaves
o ModBus TCP Server mode:o Query of a remote ModBus TCP server
• Via an ARM-SE in transparent operating mode
ARM-SE Operating Modes
ATIM: le spécialiste de la radiocommunication 75
CLIENTS@IP A
X
ARM-SE
RS485
RS232MODBUS
TCP RTU
3
12
R
ADIO
CHANNEL Z
ARM-DAARM-D
SERVER@IP C
@IP BTCP PORT: 503
MODBUS TCPCONSOLE@IP B
TCP PORT: 502
MODBUS TCPCONSOLE
R
ADIO CHANNEL X
o ModBus TCP Server mode:o Configuration:
ARM-SE Operating Modes
ATIM: le spécialiste de la radiocommunication 76
o Serial mode:1. Transparent mode
– The radio modem goes in wireless Tx as soon its receive a byte on its serial port (+ optional delay before transmission).
– Transmission (Tx) while the serial buffer (1024B) contains Bytes.– Delay after Tx before to go back to reception (Rx).– RTS/CTS RS232 flow control
ARM-SE Operating Modes
ATIM: le spécialiste de la radiocommunication 77
ARM-SE Operating Modes
TOTOBits de synchroTOTOTOTO
Equipment A Equipment B
ARM
ARM
ARM-SE ARM-SE
o Serial mode:1. Transparent mode
o Serial mode:1. Transparent mode
ARM-SE Operating Modes
ATIM: le spécialiste de la radiocommunication 79
o Serial mode:1. Securized mode
ARM-SE Operating Modes
ATIM: le spécialiste de la radiocommunication 80
ARM-SE Operating Modes
TOTOTOTO
Equipment A Equipment B
HeaderTOTOCRC CRCACKHeader
ARM
CODE
ARM
ARM
Repeater
Works also with repeater
o Serial mode:1. Securized mode
o Serial mode:1. Securized mode
ARM-SE Operating Modes
ATIM: le spécialiste de la radiocommunication 82
ARM-SE Operating Modes
HeaderModbusModbus
Equipment A
S ToR ou Ana
E ToR ou Ana
ARM-DARM-DAARM-X
Header Modbus Response
ARM
Modbus Response
ARM
RS232RS485
ARM-SE
o Serial mode:1. Modbus mode
Radio SettingsARM-SE
ATIM: le spécialiste de la radiocommunication 84
o To establish a link radios should be in same channel.
ARM-SE Radio
ATIM: le spécialiste de la radiocommunication 85
Canal Fréquence (MHz) Canal Fréquence
(MHz)
0 869.800 8 868.425 Puiss. Max. : 25mW
Duty Cycle : 1%1 868.075 9 868.4752 868.125 A 868.5253 868.175 B 869.850 Puiss. Max. : 5mW
Duty Cycle : 100%4 868.225 C 869.9005 868.275 D 869.475 Puiss. Max. :
500mWDuty Cycle : 10%
6 868.325 E 869.5257 868.375 F 869.575
o Configuration radio
ARM-SE Radio
ATIM: le spécialiste de la radiocommunication 86
o Repeating and routing table:
ARM-SE Radio
ATIM: le spécialiste de la radiocommunication 87
ARM-SE
AB
ENDPOINT 2
ARM-SE D
ARM-SE
C
MY @@DESTC1EXPC1DESTC2EXPC2DESTC3EXPC3DESTC4EXPC4DEST
C
AEDA
MY @@DESTC1EXPC1DESTC2EXPC2DESTC3EXPC3DESTC4EXPC4DEST
D
EA
AC
MY @@DESTC1EXPC1DESTC2EXPC2DESTC3EXPC3DESTC4EXPC4DEST
EA
MY @@DESTC1EXPC1DESTC2EXPC2DESTC3EXPC3DESTC4EXPC4DEST
FB
MY @@DESTC1EXPC1DESTC2EXPC2DESTC3EXPC3DESTC4EXPC4DEST
BF
MY @@DESTC1EXPC1DESTC2EXPC2DESTC3EXPC3DESTC4EXPC4DEST
AEFBBF F
ARM-SEENDPOINT 4
ARM-SE
AA
ENDPOINT 1
E
ARM-SEENDPOINT 3
User defines his path
o Addressing Principle :
ARM-SE Radio
ATIM: le spécialiste de la radiocommunication 88
@Exp @Dest Data
YES
NO=? SEND DATA
ON SERIAL PORT
NO
=?
=?
=?
NO
NOMy@ @Dest Data
REPEAT RADIO MSG.KEEP @ DEST
AND REPLACE @EXP
YES
My @@Dest
C1C2
C3C1 EXPC1 DESTC2 EXPC2 DESTC3 EXPC3 DEST
@Exp @Dest Data My @(@Dest)
C1C2
C3
C1 EXPC1 DESTC2 EXPC2 DESTC3 EXPC3 DEST
MODEM AMODEM BREPEATER
• The transmitting modem adds its local address and destination address to the radio frame.
• Modems receiving the radio frame compare the 2 addresses added to the pairs of configured addresses.
• If the additional addresses are identical to a configured pair of addresses, the message is recognised by the modem; otherwise the modem does not recognise the radio frame.
• The modem recognising the message compares the destination address for the message with its local address.
• If they are identical the message is sent over the serial link; otherwise, the modem returns the message by radio, exchanging the message’s local address with its own local address.
ExtrasARM-SE
ATIM: le spécialiste de la radiocommunication 89
o Alerts via emailo Watchdogo Input/Output
ARM-SE Extras
ATIM: le spécialiste de la radiocommunication 90
o Dataloggingo Interoperability with ARM_IOLPo Modbus RTU Slaves sleep
• ARM-SE poll them every Tcycle• Users get information via Modbus or webpages
ARM-SE Extras
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o Test modes
ARM-SE Extras
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o Firmware Update
ARM-SE Extras
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Thank youARM-SE
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Luis Martinez [email protected] Ruzzin [email protected]
www.atim.com Tel: 04 76 95 50 65