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+--- Thread: Problem with 2 modbus devices (/showthread.php?tid=766)
Problem with 2 modbus devices - Mirco - 02.05.2017
Hi guys,
I have an HomeLYnk that read from a PLC that controls an UTA, and write into a PLC that controls pumps, heating and cooling.
I used 2 profile:
- the one that read from the UTA use TCP/IP and works perfectly;
- the one that write some object (readed in the other profile) use RTU;
When the object is updated by the read of the other profile, it is not written into the PLC of the pumps. If I update the value of the object manually, it is written correctly into the PLC.
I bypassed this problem using script, but I would like to know if I've done something wrong
Thanks!
RE: Problem with 2 modbus devices - admin - 02.05.2017
It's not working for you because the modbus plugin ignores telegrams that are sent by itself, otherwise there's a high chance of having an infinite read/write loop.
RE: Problem with 2 modbus devices - Igor68 - 02.05.2017
Hi, I have 3 ports of RS-485 on lm4 . How can I make RTU settings different for each port to use Modbus profiles?
RE: Problem with 2 modbus devices - admin - 02.05.2017
Only one port can be used with mapper right now, other ports can be used via scripting.
RE: Problem with 2 modbus devices - Igor68 - 03.05.2017
Thank you, it would be good to work with the help of profiles, it is very convenient