Operating instructions

Communication
6.3 Acyclic Communication
Control Units CU240S
Operating Instructions, 10/2007, A5E00766042B AC
147
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.