Liquisys M CUM223/253 Commissioning
Endress+Hauser 45
Check
The CHECK function group is only available for devices with a Plus Package.
In the CHECK function group, you can select different monitoring functions for the
measurement.
All monitoring functions are off by default. To adapt the Sensor Check System to the current
application conditions, add and set the suitable functions.
Alarm threshold monitoring (fields P1 to P4)
You can use this function to monitor the measured value for permissible upper and lower
limits and trigger an alarm (E154, E155).
PCS alarm (Process Check System), (fields P5 to P8)
AC (Alternating Check): The function AC (field P5) is used to check measuring signals for
deviations. If the measuring signal does not change within an hour an alarm (E152) is
triggered. The reason for such sensor behavior can be contamination, cable rupture or
similar.
CC (Controller Check): You can monitor the controller activity with the function CC. This
function is mainly used for batch processes and single-sided limit switches. A malfunction
of the controller is detected and reported thanks to freely adjustable monitoring times (E156
- E157).
a0006744
Fig. 24: PCS alarm (live check)
A Constant measuring signal = alarm triggered after PCS alarm time has elapsed
Any PCS alarm pending is automatically deleted as soon as the sensor signal changes.
F8
Automatic cleaning
function start
no
yes
This field is not available for certain errors,
see "Trouble-shooting and fault
elimination" section.
F9
Select return to
menu or next error
next = next error
R
If R is selected, you return to F, if next is
selected, you go to F5.
Coding Field Setting range
(Factory settings, bold)
Display Info
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