Festo Кабели и принадлежности - Manual (Page 106)

5. Parameter channel
5−6
Festo P.BE−SPC200−COM−PDP−E N en 0901c
If the task cannot be carried out, reply identifier 7 as well as
the appropriate fault number will be transmitted (negative
reply). The SPC200 does not generate a fault if the identifier
used permits a value range which is too large, e.g. if a bit
sequence (V2) is written with task identifier 8 (array, double
word) instead of with task identifier 7 (array, word). When
reading, the SPC200 always uses the smallest possible elĆ
ement size.
The following table shows the reply identifiers:
Reply
identifier (AK) Description
0 No reply
1, 2, 3 1)
4 Transmit parameter value (array, word)
5 Transmit parameter value (array, double word)
6 Transmit number of array elements
7 Task cannot be carried out (with fault number) 2)
1) Reserved for extensions
2) Fault numbers see following table
If the task of the parameter processing cannot be carried out,
an appropriate fault number will be transmitted in the reply
telegram (bytes 7 and 8 of the PKW range). The following
table shows the possible fault numbers: