Alarm, fault and system messages
12.2 Diagnostics
SIPART PS2 with PROFIBUS communication
230
Operating Instructions, 09/2007, A5E00127926-07
Operating hours in temperature ranges T1 to T2
40 VENT1 - number of switching cycles of pilot valve 1
41 VENT2 - number of switching cycles of pilot valve 2
Both these counters sum up the control processes of pilot valves and are used to assess the
switching frequency.
42 STORE - save maintenance data
A save function can be initiated by pressing the increment button for at least 5 seconds.
The diagnostics data 7 to 18 is saved in the non-volatile memory as "data of last
maintenance". This diagnostics data contains selected values whose changes can give
information about mechanical wear and tear of the valve.
This function is normally operated through the PDM, menu item "Device-> Save
maintenance info". The data of the last maintenance data can be compared with the current
data using the PDM.
43 PRUP - prediction up
and
44 PRDN - prediction down
Also see Optimizing the controller data (Page 104)
45 WT00 bis 52 WT95 - number of operating hours in the actuating ranges WT00 to WT95
When the positioner is in the automatic mode, statistics regarding the duration for which a
valve or a flap operated in a particular section of the actuating range are continuously
maintained. The entire actuating range is divided into 8 sections from 0 to 100 %. The
positioner records the current position continuously and increments the runtime meter
assigned to the corresponding actuating range every hour. This helps in drawing conclusions
about the past operating conditions and especially in assessing the control properties of the
control loop and the entire control valve.
The actuating range is divided as follows:
Actuating range
WT00
WT05
WT10
WT30
WT50
WT70
WT90
WT95
-
≥ 5
≥ 10
≥ 30
≥ 50
≥ 70
≥ 90
≥ 95
Actuating range section [%]
< 5
< 10
< 30
< 50
< 70
< 90
< 95
-
Division of actuating range
You can simultaneously set the eight runtime meters to zero. To do this, press the
increment button for at least five seconds.
TIP: Since the actuating ranges are provided at the end of the diagnostics menu, press the
decrement button repeatedly along with the operating mode button. This will help you
in accessing the diagnostics numbers faster.
