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you can read the attached document about redundancy
Hope this help you
THANK YOU sIR,RIGHT NOW I AM USING TRIAL VERSION OF AUTOMATION BUILDER.DO WE GET ALL THE REQUIRED FEATURES ..I MEAN ALL COMMANDS AND LIBRARIES WHICH ARE REQIURED TO CREATE A APPLICATION IN TRIAL VERSION.I HAVE COM1 PORT IN PLC A AND COM1 PORT IN PLC B.I AM COMMUNICATING WITH CS31-BUs FROM PLC A TO CI590 AND CONNECTING I/O MODULES TO CI590 MODULE AND SIMILARLY FOR PLC B.
SHOULD I CONSIDER BOTH CS31-BUS FROM BOTH PLCS AS ONE BUS?HOW THIS TYPE OF CONFIGURATION IS DONE IN CODESYS WITH PLC A AND PLC B.I AM A BEGINNER, CAN YOU PLEASE EXPLAIN ME IN DETAILED.IN CONFIGURATION NOWHERE GIVEN PLC A AND PLC B WHICH IS PRIMARY AND SECONDARY
I hope the example program in the zip file provided by Mr Flavio has answers to most of your questions.
As far as i know，the latest AB 2.0 requires a license to program a HA application.In case you have a version equal to or earlier to 1.2，then all necessary HA blocks will be available as a basic feature.
Physically，the two buses are independent to each other.From a software programming point of view，configuring the HA control and diagnostic blocks，and OPC server tool is of primary concern. Wiring connection for interfacing two CPUs with a CI590 module is pretty straight forward and explained in detail in automation builder help file.
Tip:The hardware address on the CI590 module must be same as that set in the software configuration of the CI590 module parameters.
If using onboard ethernet ports for UDP communication/data synchronisation，use crossover ethernet cable.
you can find attached one example of HA application, 3ADR025154M0201
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