Operation
7.4 Communication according to PROFIdrive
SINAMICS DCP
Operating Instructions, 09/2019, A5E34382853K
199
Description of fields in the parameter request and response
Table 7- 21 Fields
Request reference
Unique identification of the request/response pair for the master. The master changes the
request reference with each new request. The slave mirrors the request reference in its
Request ID Unsigned8 01 hex
Read request
Specifies the type of request.
In the case of a write request, the changes are made in a volatile memory (RAM). A save
operation is needed in order to transfer the modified data to the non-volatile memory
Response ID Unsigned8 01 hex
02 hex
81 hex
Read request (+)
Write request (+)
Read request (-)
Mirrors the request identifier and specifies whether request execution was positive or nega-
tive.
Negative means:
Cannot execute part or all of request.
The error values are transferred instead of the values for each subresponse.
Drive object
number
Specification of the drive object number for a drive unit with more than one drive object.
Different drive objects with separate parameter number ranges can be accessed over the
Number of parameters Unsigned8 01 hex ... 27 hex No. 1 ... 39
Limited by DPV1 telegram length
Defines the number of adjoining areas for the parameter address and/or parameter value
for multi-parameter requests.
The number of parameters = 1 for single requests.
Attribute Unsigned8 10 hex
20 hex
Value
Description
Type of parameter element accessed.
Number of elements Unsigned8 00 hex
01 hex ... 75 hex
Special function
No. 1 ... 117
Limited by DPV1 telegram length
Number of array elements accessed.
Parameter number
Addresses the parameter to be accessed.
Subindex
Addresses the first array element of the parameter to be accessed.
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