Communication
6.3 Acyclic Communication
Control Units CU240S
Operating Instructions, 07/2008 - FW 3.2, A5E00766042B AD
145
Table 6-24 Description of fields in parameter response
Field
Data type
Values
Note
Request
reference
See Table above
Request positive, status ok
Unsigned8
0x01
0x02
0x81
0x82
Read request
(+)
Write request
(+)
Read request
(–)
Write request
(–)
Request negative, fault status
Response ID
Mirrors the request identifier 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 ID
See Table above
No. of
Parameters
See Table above
Format
See Table above
No. of Values
See Table above
Values
See Table above
Unsigned16
0x0000 … 0x0
0FF
Meaning of the error values see next Table
Error Values
The error values in the event of a negative response.
If the values make up an odd number of bytes, a zero byte is appended. This
ensures the integrity of the word structure of the telegram.
Note
Drive ES SIMATIC provides function blocks for parameter write/read tasks within standard
block libraries and some examples.