Emerson SI-PROFIBUS

96 Unidrive M SI-PROFIBUS User Guide
Issue Number: 3
Table 14.16 shows the data structure of a PPO 4 Word response which is returned by
SI-PROFIBUS.
Table 14.16 PPO 4 Word IN data structure
The RESPONSE ID indicates the success or otherwise of the requested transaction.
Table 14.7 lists the possible RESPONSE ID codes.
Table 14.17 RESPONSE ID codes
If RESPONSE ID 7 has been received, the error code can be read from word 3. This will
indicate the reason why the TASK ID request failed (see Table 14.18).
IN data
word
Function
b15-b12 b11 b10-b8 b7-b0
IN word 0 RESPONSE ID 0 MENU
IN word 1 PARAMETER
IN word 2 DATA HIGH word
IN word 3 DATA LOW word
RESPONSE
ID
Function Description
0 No task No non-cyclic transaction active
1 Fieldbus specific
2 Fieldbus specific
3 Not implemented
4
Transfer parameter
value (16-bit)
Returns a 16-bit data value from the request
parameter value specified by TASK ID 6, or the
successful change parameter value (16-bit)
specified by TASK ID 7.
5
Transfer parameter
value (32-bit)
Returns a 32-bit data value from the request
parameter value specified by TASK ID 6, or the
successful change parameter value (32-bit)
specified by TASK ID 8.
6
Transfer last
parameter
reference
Returns the highest parameter for the menu
specified by request last parameter reference,
TASK ID 9.
7
Error - TASK ID
could not be
executed
The previously specified TASK ID could not be
completed. Word 3 will return an error code to
indicate the reason for the TASK ID failure (see
table below).
8
Error - read only
parameter
Target parameter specified by TASK ID 7 or TASK
ID 8 is read only, and cannot be modified.