question

virginio avatar image
virginio asked

S7-1200 ModBus TCP-IP communication problem

Ahoj, taky mám stejný problém s komunikací ModBus TCP-IP s Cerberusem. S klientem jsem četl službu s ID226, zatímco s PLC Siemens S7-1200, ale s chybou služby 255.

jak jsi to vyřešil?

Díky za pomoc...


Hi, I have the same ModBus TCP-IP communication problem with Cerbero. With a Client Software I read the service with ID226 while with the Siemens S7-1200 PLC I have error with service 255.

How did you solve?

Thanks for help...

Modbus TCP
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1 Answer
janieronen avatar image
janieronen answered ·

Could you take screenshot from GX-device Modbus error? Like that:

screenshot-2023-07-21-at-205309.png

Check and re-check you have same ID than you can see in your GX modbus TCP services list

screenshot-2023-07-21-at-205328.png

After all these you can load full error log from device:

screenshot-2023-07-21-at-205115.pnghttps://www.victronenergy.com/live/ccgx:modbustcp_faq#support


screenshot-2023-07-21-at-205309.png (56.0 KiB)
screenshot-2023-07-21-at-205328.png (56.1 KiB)
screenshot-2023-07-21-at-205115.png (107.3 KiB)
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Related Resources

Modbus TCP Basics