Siemens SINAMICS G110D Operating Instructions Manual page 184

Functions
6.11 Operation in fieldbus systems
Data Write
A data write request transfers the specified parameter data to the inverter. Since the normal
PKW response is not sent, in the event that the PKW command is not successfully
completed the inverter replies with an error response containing a standard error byte of 'no
error' and a further word value containing the error code.
This request only makes sense for a PKW write command.
Image 6-45 Parameter write request and response
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Operating Instructions, 07/2016, FW V3.63, A5E36768472B AB
SINAMICS G110D