HPG800 Modbus TCP redundancy fail, In same IP address, Hot standby.
1.Please refer attached network schematic.
2.At both yokogawa Client module(A/B).
We set Server information to get modbus data.
and set same ip address(MAIN server/Back-Up server) at both yokogawa module.
3.Client B is not working until network A(Main server) would be dead.
Only Client B start working when network A is down(Back-up server start working instead of Main Server by same IP address of Main Server)
4.As per my knowledge, HPG shall works as dual in normal operation. means Back-up server also shall works always.
5.If I have to change IP configuration, Please let me know where and how I can change
Answers
Hi. As you ahve setup two independant system with the same IP address, in most cases only one of them would give you data, given that there is a common source. In your diagrm you should two Clients A & B. It is not clear what these are. The HPG800 is designed as a Modubus Server or client, but for data gathering between system, not HMI's or other applications (in general). HPG800 can be redundant, but normally only respond a single controller (same IP) where the primary and secondary (reduna=dant controller are on the SAME network. That is (from your drawing) the Main and the Backup need to be on the same network with the same addresses, but only one of them is only at any given moment.
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