Siemens SINAMICS S120 Function Manual page 755

Description of fields in the parameter request and response
Field
Request reference
Request ID
Response ID
Drive object
number
Number of parameters
Attribute
Number of elements
Parameter number
Subindex
Drive functions
Function Manual, 11/2017, 6SL3097-4AB00-0BP5
Data type
Unsigned8
Unique identification of the request/response pair for the controller. The controller changes
the request reference with each new request. The device mirrors the request reference in
its response.
Unsigned8
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
(p0971, p0977).
Unsigned8
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.
Unsigned8
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
same DPV1 connection.
Unsigned8
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.
Unsigned8
Type of parameter element accessed.
Unsigned8
Number of array elements accessed.
Unsigned16
Addresses the parameter to be accessed.
Unsigned16
Addresses the first array element of the parameter to be accessed.
11.1 Communication according to PROFIdrive
Values Remark
0x01 ... 0xFF
0x01 Read request
0x02 Write request
0x01 Read request (+)
0x02 Write request (+)
0x81 Read request (-)
0x82 Write request (-)
0x00 ... 0xFF Number
0x01 ... 0x27 No. 1 ... 39
Limited by DPV1 telegram length
0x10 Value
0x20 Description
0x30 Text (not implemented)
0x00 Special function
0x01 ... 0x75 No. 1 ... 117
Limited by DPV1 telegram length
0x0001 ... 0xFFFF No. 1 ... 65535
0x0000 ... 0xFFFF No. 0 ... 65535
Communication
755