Operation
6.6 Communication according to PROFIdrive
Inverter chassis units
228 Operating Instructions, 07/2016, A5E00331449A
Description of fields in the parameter request and response
Table 6- 14 Fields in the parameter request and response
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
response.
Request ID Unsigned8 0x01
Read job
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 0x01
0x02
0x81
Read job(+)
Write job(+)
Read job(-)
Mirrors the request ID and specifies whether request execution was positive or negative.
Negative means:
Cannot execute part or all of request.
The error values are transferred instead of the values for each subresponse.
Drive object
number
Setting for the drive object number of a drive unit with more than one drive object. Different
drive objects with separate parameter number ranges can be accessed via the same DPV1
connection.
Number of parameters Unsigned8 0x01 ... 0x27 No. 1 ... 39
Limited by DPV1 telegram length
Defines the number of following areas for the parameter address and/or parameter value
for multi-parameter requests.
The number of parameters = 1 for single requests.
Attribute Unsigned8 0x10
0x20
Value
Description
Type of parameter element accessed.
Number of elements Unsigned8 0x00
0x01 ... 0x75
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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