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+--- Thread: Modbus: permanent connection??? (/showthread.php?tid=5196)
Modbus: permanent connection??? - Amelie - 10.01.2024
I have a question about the modbus-connection (TCP) in LM.
When I add a new device (see screenshot), I can select: permanent connection. (Forgive me if the translation is not 100% correct, but I have a dutch version). What does it do?
I have looked in the manual, but I didn't really find an answer to my question.
When I check the option, the CPU of the LM goes sometimes in red. But, when I uncheck it, the CPU sty's blue. So, I wondering what is the real cause of it, and if there is something else wrong.
RE: Modbus: permanent connection??? - Daniel - 10.01.2024
Some TCP devices have limited amount of connections and they go offline after a while. Whit persistent mode the connection is never closed. Normally this is not needed, only on some devices.