Operating instructions

Alarm, error, and system messages

11.2 Diagnosis

SIPART PS2 with and without HART communications

192 Operating Instructions, 09/2008, A5E00074631-08

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 command "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 103)

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.

Note

All diagnostics values are updated in the non-volatile memory every 15 minutes so that, in

case of a power failure, only the values of the previous 15 minutes may be lost.