https://forge.codesys.com/forge/talk/Runtime/thread/2df0599b76/2020-02-27T15:13:56.907000ZRecent posts to ControlWin Modbus slave exceptions2020-02-27T15:13:56.907000Z2020-02-27T15:13:56.907000Zmstelthttps://forge.codesys.com/u/mstelt/https://forge.codesys.com5929a8d77de5e4a9f577ace5c56d5388fb6fb12f

<div class="markdown_content"><p>Hi,</p> <p>I don't get a exception code. The pasted lines above are copied fro the Wireshark log file.</p></div>

2020-02-27T15:13:56.277000Z2020-02-27T15:13:56.277000Zeschwellingerhttps://forge.codesys.com/u/eschwellinger/https://forge.codesys.com69651d11aa46cfa83b6f881aa8308934882e878f

<div class="markdown_content"><p>Hi,<br/> either you need to add the exception code or add a wireshark capture.</p> <p>BR<br/> Edwin</p></div>

2020-02-27T15:13:55.655000Z2020-02-27T15:13:55.655000Zmstelthttps://forge.codesys.com/u/mstelt/https://forge.codesys.com8d2b5ee3cf143026de8906ba3d222fab63325a8b

<div class="markdown_content"><p>I have a PC running control win as a slave and a SCADA program which is the master.</p> <p>When I run both the Control win and the SCADA program on the same PC I get exceptions on my modbus messages. When I install one PC with control win and another one with the SCADA program everything works fine. I'm trying to read and write. </p> <p>This is the log that I captured with Wireshark when both are running on the same PC:</p> <p>1 0.000000 192.168.1.150 192.168.1.150 Modbus/TCP 52 Query: Trans: 16482; Unit: 1, Func: 4: Read Input Registers<br/> 3 0.004993 192.168.1.150 192.168.1.150 Modbus/TCP 55 Query: Trans: 32866; Unit: 1, Func: 16: Write Multiple Registers<br/> 5 0.004993 192.168.1.150 192.168.1.150 Modbus/TCP 49 Response: Trans: 16482; Unit: 1, Func: 4: Read Input Registers. Exception returned <br/> 7 1.000250 192.168.1.150 192.168.1.150 Modbus/TCP 52 Query: Trans: 16483; Unit: 1, Func: 4: Read Input Registers<br/> 9 1.000250 192.168.1.150 192.168.1.150 Modbus/TCP 55 Query: Trans: 32867; Unit: 1, Func: 16: Write Multiple Registers<br/> 11 1.001251 192.168.1.150 192.168.1.150 Modbus/TCP 49 Response: Trans: 16483; Unit: 1, Func: 4: Read Input Registers. Exception returned </p> <p>This is the log when running on different PC's</p> <p>1 0.000000 192.168.1.200 192.168.1.201 Modbus/TCP 66 Query: Trans: 16426; Unit: 1, Func: 4: Read Input Registers<br/> 2 0.000280 192.168.1.201 192.168.1.200 Modbus/TCP 65 Response: Trans: 16426; Unit: 1, Func: 4: Read Input Registers<br/> 3 0.000988 192.168.1.200 192.168.1.201 Modbus/TCP 69 Query: Trans: 32810; Unit: 1, Func: 16: Write Multiple Registers<br/> 4 0.001244 192.168.1.201 192.168.1.200 Modbus/TCP 66 Response: Trans: 32810; Unit: 1, Func: 16: Write Multiple Registers<br/> 8 1.503473 192.168.1.200 192.168.1.201 Modbus/TCP 66 Query: Trans: 16427; Unit: 1, Func: 4: Read Input Registers<br/> 9 1.504294 192.168.1.201 192.168.1.200 Modbus/TCP 65 Response: Trans: 16427; Unit: 1, Func: 4: Read Input Registers</p> <p>What could be wrong?</p></div>