ABB FPBA-01 PROFIBUS DP, Руководство пользователя

Страница: 158 / 196

158 Communication protocol
The table below shows the contents of the PROFIdrive Response
header.
Field(s) Description Range
Request
Reference
(mirrored) Mirrored from the request 1…255
Response ID Response from the slave. In
case any requested services fail,
a “not acknowledged” (NAK)
response will be indicated. Request Param OK
(01h)
Request Param NAK
(81h)
Change Param OK
(02h)
Change Param NAK
(82h)
Drive Object
ID To be set to 1. 0…255
No. of
Parameters Number of parameters that are
present in the response 1…37
Format
1)
See the table on page 159 . See the table on page
159 .
Number of
Values
1)
Number of values following 0…234
Values
1)
The values of the request. In
case of an odd number of bytes,
a zero byte is appended to
ensure the word structure of the
telegram. –
1)
Only if Response ID is 01h (Request Parameter OK). The Format,
Number of Values and Values fields are repeated for other parameters.