Siemens SIPART PS2 Operating Instructions Manual page 273

Error Three- Event
code stage
7 Yes Upper endstop lim‐
it exceeded
8 No Deadband limit ex‐
ceeded
9 Yes Case 1: Reference
stroke time for par‐
tial stroke test is ex‐
ceeded.
Case 2: Start posi‐
tion outside the
start tolerance
10 Yes Deviation from ex‐
pected dynamic
control valve be‐
havior
11 Yes Valve leakage
12 Yes Stiction limit (slip‐
stick) exceeded
13 Yes Temperature un‐
dershot
14 Yes Temperature over‐
shot
15 Yes Position average
deviates from the
reference value
16 No Partial stroke test
is to be carried out
with non-plausible
parameter values
Refer to the corresponding parameter descriptions for additional information about parameters
1)
SIPART PS2 with PROFIBUS PA
Operating Instructions, 05/2019, A5E00127926-AC
Parameter setting Error message disappears
when
G. OPEN≠OFF ... the deviation of the endstop
**.YCLS = do or disappears or the device is re-
1)
up do initialized.
E. DEBA≠OFF ... the limit is undershot again
**.DEBA = Auto
1)
A. PST≠OFF Case 1: ... a partial stroke test
is successfully executed with‐
in the reference stroke time or
the function is deactivated.
Case 2: Move the actuator into
the range of the PST start tol‐
erance. Or increase the PST
start tolerance until the actua‐
tor (PST start position) is with‐
in the PST start tolerance.
Start the partial stroke test
again.
b. DEVI≠OFF ... the position is again in a
narrow corridor between the
setpoint and the model, or the
function is deactivated.
C. LEAK≠OFF ... the valve leakage has been
remedied or the function is de‐
activated.
d. STIC≠OFF ... Slipjumps can no longer be
detected, or the function is de‐
activated.
H. TMIN≠OFF ... the low temperature thresh‐
olds are no longer undershot.
J. TMAX≠OFF ... the high thresholds are no
longer overshot.
P. PAVG≠OFF ... the average position value
calculated after a comparison
interval is again within the
thresholds for the reference
value, or the function is deac‐
tivated.
A. PST≠OFF the parameter values entered
in A1.STPOS, A3.STRKH and
A4.STRKD are plausible.
Diagnostics and troubleshooting
12.3 Online diagnostics
Possible causes
Wear and tear of the valve
seat, deposits or foreign bod‐
ies in the valve seat, mechan‐
ical misalignment, friction
clutch moved.
Increased packing gland fric‐
tion, mechanical gap in the po‐
sition feedback.
Case 1: Valve is stuck or rus‐
ted. Increased stiction.
Case 2: Valve is present in the
safety position.
Actuator fault, valve fault,
valve jams, increased stiction,
decreased compressed air
Pneumatic leakage
Increased stiction, valve no
longer moves smoothly but in
jerky motion.
Ambient temperature too low
Ambient temperature too high
In the last comparison inter‐
val, the valve trajectory was
changed so severely that a de‐
viating average value of posi‐
tion was calculated.
Parameters for partial stroke
test are non-plausible
273