Emerson SI-PROFIBUS

Unidrive M SI-PROFIBUS User Guide 77
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
Figure 12-3 DP-V1 Fault Buffer
Table 12.6 Fault Buffer Associated PNU’s
PNU Designation Description
944 Fault message
counter
Incremented by one when the fault buffer changes
947 Fault number Contains the fault numbers of the recorded faults
Element Description
0 Last unacknowledged fault (Pr
10.020)
1 to 7 Acknowledged faults in reverse order
of occurrence
950 Fault buffer scaling Defines the number of fault situations and the number
of faults per situation. (factory set to 8 and 1
respectively)
The fault buffer contents are stored in internal memory and will be cleared on a module
reset or power-down.
Read
PNU
947
Fault Number
PNU 944
Fault Message
Counter
Unacknowledged fault
1 – Most recent acknowledged fault
2 –
Acknowledged faults
3 –
4 –
5 –
6 –
7 –
0 – Active fault
Fault
Message
+1
Read
Fault Present
(Status Word bit 3=1)
Fault
Reaction
Acknowledged
fault moves to
position 1
Any existing
acknowledged
faults move
down one
position
Any previous
fault in position
7 is lost
Fault
NOTE