Siemens 6DR55 Series, Manual

Page: 120 / 178

Operation
118
SIPART PS2 PA Manual
A5E00127926--05
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
evaluate the control properties of the control circuit or the entire fitting.
The setting range is divided as follows:
Distance class WT00 WT05 WT10 WT30 WT50 WT70 WT90 WT95
Setting range
section < 5 %
≥
5 %
<10 %
≥
10 %
<30 %
≥
30 %
<50 %
≥
50 %
<70 %
≥
70 %
<90 %
≥
90 %
<95 %
≥
95 %
You can collectively set the 8 operating hours meters to zero by
pressing 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.
4.5.3 Online--diagnosis
Some important variables and parameters are monitored continuously
during operation. In the ”Configuration” operating mode you can
configure 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.
Error
code
Event Parameter
setting
Fault message
disappears when ...
Possible causes
1 Remaining con-
trol error
always active ... the control error has
disappeared again
Compressed air missing,
actuator fault, valve fault
(e.g. blockade).
2 Instrument not
in automatic
mode
43. FCT= nA
or = nAB
... the instrument is
brought into automatic
mode
The instrument is configured
or is in manual operation.
36 WT00 to
43 WT95