Hi everybody!

I am facing the same issues now, except I'm setting up 3 connections. (315F-3 PN/DP V3.2, Simatic 5.6).

To clearify, you are running all your instances of FB102 in the same cyclic OB? OB1 I assume?

Does Siemens have any example projects of this? I can only find examples for one connection, or multiple connections where only one connection is active at a time. To "save" connections.

Thanks :)

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Split from How To configure Multi servers against 1 client MODBUS TCP/IP CP.

Hi,

What JMP conditions are you referring to? The STL code in the example projects from Siemens (our code is also based on this code). 

I am trying to run three instances of the MODBUSPN FB simultaneously, with separate instance DB's and PARAM DB's. The 315 is client in all three connections. The three PARAM data sets are configured with different server IP's and different local port number (local_tsap_id), but the same remote port number (rem_tsap_id).

To my understanding, I should be able to run telegrams to all three Modbus Servers at the same time, with no need for scheduling in the PLC. Is this correct?

Thanks for any advice, I will supply more info soon.