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4.8
Fault correction
Diagnostics indicator
In which operating mode did the fault occur?
Initialization
•
Manual mode and automatic mode
•
Under which circumstances and conditions did the fault occur?
Wet environment (e.g. heavy rain or constant condensation)
•
Vibrating fittings
•
Under impact or shock (e.g. steam jets or breakaway flaps)
•
Damp (wet) compressed air
•
Dirty (contaminated with solid particles) compressed air
•
When does the fault occur?
Constantly (reproducibly)
•
Sporadically (not reproducible)
•
Usually after a certain operating period
•
Fault description (symp-
toms)
Positioner comes to a
•
halt in RUN 1
Positioner comes to a
•
halt in RUN 2
Positioner comes to a
•
halt in RUN 3
Positioner comes to a
•
halt in RUN 5, does
not reach FINISH
(waiting time > 5 min)
Table 3
Events which can activate the fault message output
SIPART PS2 PA Manual
A5E00127926--05
Possible cause(s)
Initialization started from the
•
final stop and
Reaction time of max. 1 min. not
•
waited
Network pressure not
•
connected or too low
Transmission ratio selector and
•
parameter 2 (YAGL) and true
stroke did not correlate
Stroke on the lever incorrectly
•
set
Piezo valve(s) do not switch
•
(see Table 4)
Positioning times for up and
•
down exceeded
Play in the positioner, actuator,
•
fittings system
see
3
4
4
4
5
4
4
3
7
4
Corrective actions
Up to 1 min. waiting time required
•
Do not start initialization from an
•
end stop
Confirm network pressure
•
Check settings:
•
See leaflet: Figure Device view (7)
•
and parameters 2 and 3
Check stroke setting on the lever
•
see Table 4
•
Open restrictor fully and/or set
•
pressure PZ(1) to the highest
permissible value
Use booster if necessary
•
part--turn actuator:
•
Check seating of the stud screw of
the coupling wheel
Linear actuator:
•
Check seating of the lever on the
positioner shaft
Correct any other play between the
•
actuator and the fittings
Operation
Table
5
6
7
7
5
4
5
6
5
7
127
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