2 acyclic data transfer, Acyclic data transfer, Communication manual 8400 protec profibus – Lenze E84Dxxxx User Manual
Page 47
Communication manual 8400 protec PROFIBUS
Parameter data transfer
DP-V1 parameter data channel (PROFIdrive profile)
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EDS84DPBUS EN 2.0 - 09/2010
8.3.2
Acyclic data transfer
[8-3]
Transmission directions
Explanation
A "Write.req" is used to pass the data set (DB47) to the slave in the form of a parameter
request.
With "Write.res" the master receives the confirmation for the receipt of the message.
The master requests the response of the slave with "Read.req".
The slave responds with "Read.res (-)" if it has not yet completed the processing.
When the parameter processing is completed, the parameter request is completed by
transmitting the parameter response to the master with "Read.res (+)".
Note!
A parameter request refers to one or several parameter(s) (multi-parameter
request).
E94YCPM011
Master
Slave
DP-V1
Write.res
Write.req
with data (parameter request)
with data (parameter response)
without data
without data
without data
without data
Read.req
Read.res (-)
Read.req
Read.res (+)
Parameter response
Parameter request
Parameter request
Parameter
processing
Parameter response