Commissioning Liquisys M CUM223/253
46 Endress+Hauser
Monitoring functions at a glance
The function group "Check" is used to monitor the lower und upper limits of the measured
value and to initiate alarms.
Functional
description
Possible
settings
Alarm event Application
Alarm threshold
monitoring
(P1 to P4)
– Freely
adjustable
lower alarm
threshold (AT)
– Freely
adjustable
upper alarm
threshold (AT)
off —
Applications with
or without dosage
control of
chemicals
only lower AT Lower AT reached or
dropped below
only upper AT Upper AT reached or
exceeded
lower and
upper AT
Lower AT reached or
dropped below or upper
AT reached or exceeded
Controller
monitoring (CC:
Controller
Check, P5 to P8)
–Switch-on
period
monitoring
– Switch-off
period
monitoring
off — Applications with
dosage control of
chemicals
on Set maximum period for
permanent switch-on or
switch-off exceeded
Sensor activity
monitoring (AC:
Alternation
Check, P5 to P8)
Monitoring for
signal change
off — Applications with
or without dosage
control of
chemicals
on No change within 1
hour
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