Emerson FXMP25 User Manual page 63

9.4 Status indications
Table 9-4 Status indications
Left hand
display
ih
The field controller is inhibited because the field controller is disabled
[Pr 77 = OFF (0)].
tr
The field controller has tripped. The trip code will be displayed in the 'right
hand' display (see Chapter 9
rn
The field controller is in a run state.
Pr 78 = Mode Selected and
Pr 77 = On (1) in Standalone Mode or
Mentor MP Pr 5.77 = On (1) In MP Mode or
Mentor II ribbon cable is connected in Mentor II mode.
9.5 Displaying the trip history
The FXMP25 retains the last four trips that have occurred. Table 9-5 shows parameters
used to store the last four trip.
Table 9-5 Trips
Parameter
90
91
92
93
9.6 Behavior of the FXMP25 when tripped
If the FXMP25 trips the output of the FXMP25 is disabled so that the FXMP25 stops
controlling the field. If any trip occurs the following read only parameters are frozen to
help in diagnosing the cause of the trip.
Table 9-6 Parameters frozen on trip
Parameter
02
54
56
58
03
Analog and digital I/O
The analog and digital I/O on the FXMP25 continue to work correctly if a trip occurs.
FXMP25 User Guide
Issue Number: 3
Field controller inhibited
Field controller has tripped
Diagnostics
Field controller is running
Description
Trip 0 (most recent trip)
Trip 1
Trip 2
Trip 3
Description
Armature voltage
Flux feedback
Field current feedback
Field firing angle
Flux reference
www.controltechniques.com
Description
on page 60).
63