Rockwell Automation 160PD1 160 Profibus Communication Module - Manual (Page 43)

Using the 160-PD1 on Profibus 6–17
This is an example of a write drive parameter (all values in hex)
N7:40 is the Logic Control Word, where LSB = 5F (Drive running),
MSB = A0 (write operation).
N7:41 is the parameter number 1Eh (30 decimal) = [Accel Time 1].
N7:42 is the data to be sent to the drive 14h (20 decimal),
which represents an Accel = 2.0 seconds.
N7:50 is not relevant when a write operation is in progress.
However it will provide 14h when revert to a read operation.
N7:51 is a copy of the parameter number (Index) in the LSB
and the handshake if read operation was successful (MSB = 1).
This is an example of a read after a write drive parameter
(all values in hex)