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AC 10 Modbus ASCII abnormal response


I'm currently trying to control an AC10 via Modbus ASCII but whatever command I send I always get an abnormal response.

For Example:

Request:    010620000001B6       (Start Command)
Response: 01860376

Request:    0103010E0001A5       (Read register F114)
Response: 01830379

As far as I know, the response means illegal data but I don't see an error in my requests.
Is there maybe something wrong with the requests that I'm not aware of?

Thanks for the help!