Emerson SI-PROFIBUS - Page 99

Unidrive M SI-PROFIBUS User Guide 99
Issue Number: 3
Safety
information
Introduction
Mechanical
installation
Electrical
installation
Getting
started
Parameters
GSD
Files
Cyclic data
Non-cyclic
data
Control and
status words
Diagnostics
PROFIdrive
profile (V4)
Advanced
features
Legacy
features
Glossary of
terms
Index
14.7.4 Writing parameters using PPO 4 Word mode
Figure 14-4 shows the sequence of events required to write to a drive parameter using
the PPO 4 Word non-cyclic channel.
Figure 14-4 PPO 4 Word write sequence
Table 14.22 shows the possible TASK ID and RESPONSE ID combinations that may be
seen when attempting to write to the drive.
Table 14.22 PPO 4 Word write TASK ID and RESPONSE ID combinations
Function TASK
ID
RESPONSE
ID
Message status
No Task 0 0 No message active.
Write Parameter
Value (16-bit)
7 4 Parameter (16-bit) written successfully.
Write Parameter
Value (32-bit)
8 5 Parameter (32-bit) written successfully.
Write Parameter
Value (16-bit)
77
TASK ID 7 could not be executed. Check
the error code in IN word 3 for the reason
why.
Write Parameter
Value (32-bit)
87
TASK ID 8 could not be executed. Check
the error code in IN word 3 for the reason
why.
Write Parameter
Value (32-bit)
88
Parameter is read only, and cannot be
written to.
START
Set OUT Word
0 to 0
ERROR:
Parameter is
read only
CASE:
RESPONSE ID
END OF
SEQUENCE
Specify
PARAMETER in
OUT Word 1
Specify DATA HIGH
WORD in OUT
Word 2
Specify DATA LOW
WORD in OUT
Word 3
Specify TASK ID
and MENU in OUT
Word 0
SUCCESS:
16-bit data
value written to
parameter
0
4 5
8
SUCCESS:
32-bit data value
written to parameter
ERROR:
TASK ID could
not be
executed
7