Endress+Hauser Liquiline CM44P - Page 103

Liquiline CM44P Operation
Endress+Hauser 103
Menu/Setup/Additional functions/Limit switches/Limit switch 1 ... 8
Function Options Info
Operating mode Selection
• Above limit check
• Below limit check
• In range check
• Out of range check
• Change rate
Factory setting
Above limit check
Type of limit value monitoring:
• Limit value overshoot or undershoot→  86
• Measured value within or outside a range
→  87
• Rate of change →  89
Limit value Settings depend on the
measured value
Operating mode = Above limit check or Below
limit check
1
2
t
MV
t
1
t
2
t
3
t
4
t
5
1
2
t
MV
t
1
t
2
t
3
t
4
t
5
A B
A0028523
 86 Exceeding (A) and undershooting (B) a limit value (without hysteresis and switch-on delay)
1 Limit value
2 Alarm range
t
1,3,5
No action
t
2,4
An event is generated
• If measured values (MV) are increasing, the relay contact is closed when the switch-on point is exceeded
(Limit value + Hysteresis) and the start delay (Start delay) has elapsed.
• If measured values are decreasing, the relay contact is reset when the switch-off point is undershot (Limit
value - Hysteresis) and after the drop-out delay (Switch off delay).
Range lower value Settings depend on the
measured value
Operating mode = Out of range check or In
range check
Range upper value
1
2
t
MV
t
1
t
2
t
3
t
4
A B
3
3
1
2
t
MV
t
1
t
2
t
3
t
4
3
A0028524
 87 Range monitoring outside (A) and within (B) a range (without hysteresis and switch-on delay)
1 End of range
2 Start of range
3 Alarm range
t
1-4
An event is generated
• If measured values (MV) are increasing, the relay contact is closed when the switch-on point is exceeded
(Range lower value + Hysteresis) and the start delay (Start delay) has elapsed.
• If measured values are decreasing, the relay contact is reset when the switch-off point is undershot (Range
upper value - Hysteresis) and after the drop-out delay (Switch off delay).