Commissioning (software)
5.9 Commissioning with PROFIBUS DP
Control Units CU240S
Operating Instructions, 11/2006, A5E00766042B AA
5-95
Description of fields in DPV1 parameter request and response
Table 5-37 Description of fields in parameter request
Field Data type Values Note
Unsigned8 0x01 … 0xFF 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.
Unsigned8 0x01
0x02
Read request
Write request
Request ID
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 data to the non-volatile
memory (P0971).
Unsigned8 0x00 … 0xFF Number Drive object ID
Setting for the drive object number with 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 0x01 … 0x27 No. 1 … 39
Limited by DPV1 telegram length
No. of
Parameters
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 0x10
0x20
0x30
Value
Description
Text (not implemented)
Attribute
Type of parameter element accessed.
Unsigned8 0x00
0x01 … 0x75
Special function
No. 1 … 117
Limited by DPV1 telegram length
No. of Elements
Number of array elements accessed.
Unsigned16 0x0001 … 0xF
FFF
No. 1 … 65535 Parameter
number
Addresses the parameter to be accessed.
Unsigned16 0x0000 … 0xF
FFF
No. 0 … 65535 Subindex
Addresses the first array element of the parameter to be accessed.
Format Unsigned8 0x02
0x03
0x04
0x05
0x06
0x07
0x08
Other values
0x40
0x41
0x42
0x43
0x44
Data type Integer 8
Data type Integer 16
Data type Integer 32
Data type Unsigned 8
Data type Unsigned 16
Data type Unsigned 32
Data type Floating Point
See PROFIdrive Profile
Zero (without values as a positive
subresponse to a write request)
Byte
Word
Double word
Error
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