ebm-papst ECI-63.XX-K4 - Manual (Page 93)

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9 RS485 Communication
9.18.3 Error flags
Bit Meaning
7
6
5
4 Incorrect access key
9.19 Undefined telegrams
Undefined telegrams are not answered. Corresponding error flags are set in the start byte of the response. Use of an already defined
response should simplify processing on the ho side.