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Automation and Drives

SIMATIC S7Software Redundancy


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A D AS SM6 R.Fischer 2IMATIC Software Redundancy

SIMATICSW Redundancy

SW RedundancyPrinciple

Steam Production

Boiler 1 Mixer Boiler 2 Dryer

REDUNDANCY Area

PrinciplePositioningApplication FieldsConfigurationFeaturesOrder number and deliveryform


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SW RedundancyPositioningLow Cost / Low Performance Redundancy solution based on standard componentsUniversal solution for all CPU

from CPU 315-2DP until CPU 417-4Marketing parallel to S7-400H



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SWRedundancyApplication FieldsApplication for processes that tolerate a Master-Slave switchover time of about a secondExamples:

Water treatment Control of cooling systems Control and monitoring of

temperature levels

Traffic control Measuring registration



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SW Redundancy with S7-400Configuration

Redundant AreaNon redundant

MPI/ Profibus/ Ethernet

Redundancy Connection

Master

controller

Back up

controller

Non redundant

AreaArea

ET 200M with

IM 153-2

Active Bus Backup Bus



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Profibus DP Redundancywith Standard IM 153-2

IM

IM

Bus module (BM)

Active

Bus module

Profibus DP

ET 200M

with active Bus modules

L+

L+

Redundant IM 153-2PrinciplePositioningApplication FieldsConfigurationFeaturesOrder number and deliveryform

Available as individual componentsIM: 6ES7 153-2AA02-0XB0BM: 6ES7 195-7HD00-0XA0

or as Bundle (2 x IM + 1 BM)6ES7 153-2AR00-0XA0


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SW RedundancyFunction

Master

Reception of status information

from reserve controller

Non redundant user program

processing

Redundant user program

processing

Transmission of redundant data to

reserve controller

Writing of non redundant and

redundant outputs

Reserve

Reception of information from

master controller

Reading of Inputs

Writing of non redundant

outputs

Non redundant user program

processing

Transmission of information to

the master controller

Reading of Inputs


A d D


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SW Redundancy with S7-400

Redundant area

MPI/ PROFIBUS/ Ethernet

Redundancy Connection

Master

controller

Back up

controller


A i d D i


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SW Redundancy with S7-400 and WinCC

Redundanzbereich

PROFIBUS/MPI/Ethernet

Master

controller

Back up

controller

Non

redundant

area

WinCC Redundancy script

Redundant area


A t ti d D i


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SW Redundancywith single PROFIBUS

MPI/PROFIBUS/ Ethernet

Master

controller

Back up

controller


Automation and Dri es


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SW Redundancy withredundant Ringbus

MPI/PROFIBUS/ Ethernet

Master

controller

Back up

controller

OLM




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SW Redundanz with Multi Redundancy

Back upcontroller

Redundant areaRedundant area

Nonredundantarea

Nonredundantarea




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SW RedundancyFeaturesMaster slave switchover time dependant on:

CPU-Type number of I/O and number of DP-slaves volume of data to be transfered communication device

Example with 2 CPU 414-2 DP, 4 DP-Slaves, 4 kBytes Data, communication throught Profibus Data transfer time appr. 1 s DP-Slave swithover appr. 20 ms Fault detection time appr. 100ms Sum appr. 1,1 s




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SW RedundancyFeaturesSwitchover procedure

Outputs are beeing frozen during the switchover After the switchover, the transfered data are used

Switchover reasons Master failure (Power off or CPU-STOP) Failure of the Profibus-DP of the master controller Manual switchover

Memory requirement is 10 kBytesSTEP7 V 4.02 is required




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SIMATIC S7Software-Redundancy

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