S7-1200 ModBus TCP-IP communication problem

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virginio asked Jul 21, '23

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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Modifications Space

Node Red Space

Answer 1 · 2023-07-21T17:55:45Z

janieronen answered · Jul 21, 2023 at 05:55 PM

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

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

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

https://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)

2 |3000

Attachments: Up to 8 attachments (including images) can be used with a maximum of 190.8 MiB each and 286.6 MiB total.

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