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[KB301]Applicom – OPC Redundancy (only available from V3.6.0, all cards & messaging)

Tags: Applicom, OPC

Data acquisition
14 years ago
By RM
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Applies to:

PcVue all versions.
Summary:

You need to change the target device during the process .

Use OPC redundancy (swap.ini file & EQU_CHANGE item).
Details:

Benefits:

  • 1srt OPC Server in the world providing this feature
  • Managed directly in the OPC server
  • Working whatever the SCADA or the protocols used
  • High performance – no cancellation of the item advise during the swap
  • Feature available with applicom® hardware and software

redundancy_OPC1

Board(s) must imperatively be located in the same computer.

redundancy_OPC2

After a PcInit, in your OPC client, you’ll see a “EQU_CHANGE” ITEM in relation with your TOPIC (PLC1 in this example).

You have to use this ITEM to choose your way (NORMAL when value is “0” or REDUNDANCE when the value goes “1” ).

redundancy_OPC3

redundancy_OPC4

Created on: 17 Dec 2010 Last update: 13 May 2024