Endress+Hauser Liquiline CA80SI, Руководство по эксплуатации

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Operation Liquiline System CA80SI
96 Hauser
Menu/Setup/Additional functions/Limit switches/Limit switch 1 ... 8
Function Options Info
Delta value Settings depend on the
measured value Operating mode = Change rate
The slope of the measured value (MV) is
monitored in this mode.
If, in the specified time frame (
Delta time ), the
measured value increases or decreases by more
than the specified value (
Delta value ), an event
is generated. No further event is generated if the
value continues to experience such a steep
increase or decrease. If the slope is back below
the limit value, the alarm status is reset after a
preset time (
Auto confirm ).
Events are triggered by the following conditions
in the example given:
t
2
- t
1
< Delta time and ∆MV1 > Delta value
t
4
- t
3
> Auto confirm and ∆MV2 < Delta value
t
6
- t
5
< Delta time and ∆MV3 > Delta value
Delta time 00:00:01 ... 23:59:00
Factory setting
01:00:00
Auto confirm 00:01 to 23:59
Factory setting
00:01
t
MV
t
1
t
2
t
3
t
4
t
5
t
6
MV
1
MV
2
MV
3
A0028526
 69 Rate of change
10.7.2 Time switch
A time switch provides a time-controlled, binary process value. This can be used as a
source by the "Formula" mathematical function.
y
t
A
B
C
0
1
A0041544
 70 Signal pattern of a time switch
t Timeline
y Signal level (1 = on, 0 = off)
A Period
B Signal duration
C Start time ( Start date , Start time )