WEST P4100 - Alarm Operation

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-DIN,
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-DIN &
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- DIN Controllers & Indicators - Product Manual
Page 108 Glossary 59305, Issue 5 – March 2005
Output Off..Output On
Al
arm
Off
..
Al
arm
O
n
Direct-Acting
Al
arm.
V
a
l
ue
Output On..Output Off
Al
arm
Off
..
Al
arm
O
n
Reverse-Acting
Al
arm.
V
a
l
ue
Output On..Output Off
Al
arm
O
n..
Al
arm
Off
Direct-Acting
Al
arm.
V
a
l
ue
Output Off..Output On
Al
arm
O
n..
Al
arm
Off
Reverse-Acting
Al
arm.
V
a
l
ue
Output On..Output On
Al
arm
O
n..
Al
arm
O
n
Direct-Acting
Al
arm
V
a
l
ue
Al
arm
V
a
l
ue
Output Off.
Al
arm
O
n..
Al
arm
O
n
Reverse-Acting
Al
arm
V
a
l
ue
Al
arm
V
a
l
ue
Output Off..Output On
Al
arm
Off
..
Al
arm
O
n
Direct-Acting
Al
arm
V
a
l
ue
Output On.
Al
arm
Off
..
Al
arm
O
n
Reverse-Acting
Al
arm
V
a
l
ue
Output On..Output Off
Al
arm
O
n..
Al
arm
Off
Direct-Acting
Al
arm
V
a
l
ue
Output Off..Output On
Al
arm
O
n..
Al
arm
Off
Reverse-Acting
Al
arm
V
a
l
ue
Process High Alarm
Process Variable
Process High Alarm
Process Variable
Process Low Alarm
Process Variable
Process Low Alarm
Process Variable
Band Alarm
Output Off
A
larm Off
Process Variable
Band Alarm
Output On .Output Off
A
larm Off
Process Variable
Deviation High
Alarm (+ve values)
Process Variable
Deviation High
Alarm (+ve values)
.Output Off
Process Variable
Setpoint
Process Variable
Deviation Low
Alarm (-ve values)
Process Variable
Deviation Low
Alarm (-ve values)
Alarm Operation Type: General Definition
The different alarm types are shown below, together with the action of any outputs.
Also refer to Alarm Hysteresis, Alarm Inhibit, Band Alarm, Deviation Alarm, Latching Relay,
Logical Alarm Combinations, Loop Alarm, Process High Alarm and Process Low Alarm.
Figure 42. Alarm Operation