Online-Diagnosis - Siemens PROFIBUS PA SIPART PS2 Manual

Operation
36 WT00 to
43 WT95
Distance class WT00
Setting range
section < 5 %

4.5.3 Online-Diagnosis

Error Event
code
1 Remaining con-
trol error
2 Instrument not
in automatic
mode
3 Digital input DI1
or DI2 active
4 Limit value
Number of stro-
kes exceeded
108
Number of operating hours in distance class WT00 to WT95
If the positioner is in automatic mode, statistics are constantly kept for
how long a valve or a flap has been operated in which section of the
setting range. To do this, the total setting range (0 to 100%) is divided
into 8 sections (distance classes). The positioner continuously registers
the current position and increments the operating hours meter assigned
to the corresponding section (distance class) every hour. This allows
returns to previous operating conditions and is particularly used to eval-
uate the control properties of the control circuit or the entire fitting.
The setting range is divided as follows:
WT05 WT10
≥5 % ≥10 %
<10 % <30 %
You can collectively set the 8 operating hours meters to zero by press-
ing the increment key (for at least 5 seconds).
TIP: As the distance classes at the end of the diagnostic menu have
the numbers 36 to 43, in addition to the operating mode key press the
decrement key repeatedly. This takes you quickly to the diagnostic
numbers 36 to 43.
Some important variables and parameters are monitored continuously
during operation. In the "Configuration" operating mode you can config-
ure this monitoring so that the fault message output is activated when a
certain event such as exceeding a limit value occurs.
The following table shows which events can activate the fault message
output, how the parameters must be set for this event to be monitored,
when the fault message disappears again and where the possible
causes of the fault lie.
In automatic and manual operation response of the fault message
output on the display shows which is the fault message trigger. The two
digits at the bottom left indicate the corresponding error code. If several
triggers occur at the same time, these are displayed cyclically.
Parameter Fault message dis-
setting appears when ...
always active ... the control error has
disappeared again
43. FCT= nA ... the instrument is
or = nAB brought into automatic
mode
43. FCT= nAB ... the digital input is no
and digital function longer activated
BIN1 or BIN2 to
"on"
... the stroke counter is
46. STRK¸OFF
reset or the limit value
increased
WT30 WT50 WT70
≥30 % ≥50 % ≥70 %
<50 % <70 % <90 %
Possible causes
Compressed air missing,
actuator fault, valve fault
(e.g. blockade).
The instrument is configured
or is in manual operation.
The contact connected to
the binary input has become
active (e.g. stuffing box
monitoring, excess
pressure, temperature
switch).
The total distance traveled
by the actuator exceeded
the set limit value.
WT90 WT95
≥90 % ≥95 %
<95 %
SIPART PS2 PA Manual
A5E00127926-03