DP-V1 communication
78
DP-V1 read/write request sequence
A read/write service on a drive parameter is illustrated below.
The messaging employs DP-V1 data units. The PROFIdrive
parameter request is contained within the DP-V1 request as data.
Likewise, the DP-V1 response contains the PROFIdrive
parameter response as data.
A write request (Function number 5Fh – see Table 15 below) is
first sent containing the parameter request.
If the write request is valid, the RPBA-01 acknowledges it with DP-
V1 write response code 5Fh with no data. The master will then
send a read request. If the RPBA-01 is still busy performing the
internal parameter request, it will return a negative response with
the DP-V1 error code B5h (State conflict). In this case, the read
Master DP-V1 Slave
Parameter
processing
Parameter request
Parameter response
PROFIdrive Write request DB47
Write response
without data
Read request DB47
without data
Read response (–)
without data
Read request DB47
without data
Read response
with data
Parameter request
PROFIdrive
Parameter response
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