Siemens SIPART PS2 FF

Functional safety for SIPART PS2 FF
32 A5E00489774-02, 10/2013
C.3
Troubleshooting
C.3.1
Fault identification
Diagnostics guide
Fault
Remedial measures, see
table
In which mode does a fault occur?
●
Initialization
1
● Manual and automatic modes
2
3
4
5
In which environment and under which boundary conditions does a fault occur?
● Wet environment (e.g. strong rain or constant condensation)
2
●
Vibrating (oscillating) control valves
2 5
● Impact or shock loads (e.g. vapor shocks or breakaway valves)
5
●
Moist (wet) compressed air
2
● Dirty (contaminated with solid particles) compressed air
2
3
When does a fault occur?
● Regularly (reproducible)
1
2
3
4
●
Sporadically (not reproducible)
5
● Mostly after a specific operation time
2
3
5
C.3.2
Remedial measures table 1
Fault profile (symptoms)
Possible cause(s)
Remedial measures
● Positioner remains in "RUN 1". ● Initialization started from the end
position and
●
The response time of a maximum of
1 minute was not observed.
● Network pressure not connected or
it is too low.
● A waiting time of up to 1 minute is
essential.
● Do not start initialization from the
end position.
● Provide the network pressure.
●
Positioner remains in "RUN 2".
●
Transmission ratio selector and
parameter 2
● "YAGL" and the real stroke do not
match.
● Incorrectly set stroke on the lever.
●
Piezo valve does not activate.
●
Check settings: see leaflet: "Device
view (7)" picture as well as
parameters 2 and 3
● Check the stroke setting on the
lever. See table 2
●
Positioner remains in "RUN 3".
●
Actuator actuating time is too high.
●
Open the restrictor completely
and/or set the pressure PZ (1) to
the highest permissible value.
●
Use a booster if required.
●
Positioner remains "RUN 5", does
not go up to "FINISH" (waiting time
> 5 min).
●
"Gap" (play) in the positioner -
actuator - control valve system
●
Part-turn actuator: check for the
firmness of the grub screw of the
coupling wheel
● Linear actuator: check for the
firmness of the lever on the
positioning shaft.
● Remove any play between the
actuator and the control valve.
Fault table 1