3 10 Deviation Band Alarm
3 10 Deviation Band Alarm
Examples:
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ON
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OFF
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OFF
Figure 3.13
Normal Deviation
Band Alarm
Figure 3.13
Normal Deviation
Band Alarm
Figure 3.14
Latching Deviation
Band Alarm
Figure 3.14
Latching Deviation
Band Alarm
Figure 3.15
Holding Deviation
Band Alarm
Figure 3.15
Holding Deviation
Band Alarm
A1FN = DB.HI, A1MD = NORM, SP1 = 100, A1DV = 5
A1FN = DB.HI, A1MD = NORM, SP1 = 100, A1DV = 5
A1FN = DB.LO, A1MD = LTCH, SP1 = 100, A1DV = 5
A1FN = DB.LO, A1MD = LTCH, SP1 = 100, A1DV = 5
A1FN = DB.HI, A1MD = HOLD, SP1 = 100, A1DV = 5
A1FN = DB.HI, A1MD = HOLD, SP1 = 100, A1DV = 5
Process proceeds
Process proceeds
Process proceeds
Process proceeds
Process proceeds
Process proceeds
Process proceeds
Process proceeds
ON
Figure 3.16
Latching /Holding
Deviation Band Alarm
Figure 3.16
Latching /Holding
Deviation Band Alarm
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A1FN = DB.HI, A1MD = LT.HO, SP1 = 100, A1DV = 5
A1FN = DB.HI, A1MD = LT.HO, SP1 = 100, A1DV = 5
2 Types of Deviation Band Alarms:
Deviation Band Alarm 1
Deviation Band Alarm 2 :
DB.HI, DB.LO
:
Setup: A1FN, A1MD
Adjust: SP1, A1DV
Trigger levels= SP1±A1DV
Setup : OUT2, A2FN, A2MD
Adjust : SP1, A2DV
Trigger levels = SP1±A2DV
2 Types of Deviation Band Alarms:
Deviation Band Alarm 1
Deviation Band Alarm 2 :
DB.HI, DB.LO
:
Setup: A1FN, A1MD
Adjust: SP1, A1DV
Trigger levels= SP1±A1DV
Setup : OUT2, A2FN, A2MD
Adjust : SP1, A2DV
Trigger levels = SP1±A2DV
51
A deviation band alarm presets two reference levels relative to the set point.
There are two types of deviation band alarms which can be configured. These
are deviation band high alarm (A1FN or A2FN select DB.HI) and deviation
band low alarm ( A1FN or A2FN select DB.LO ).
Trigger levels of a deviation band alarm move with the set point. For alarm 1,
the trigger level=SP1±A1DV. For alarm 2, the trigger level=SP1±A2DV.
One of 4 different of alarm modes can be selected for alarm 1 and alarm 2. These
are : Normal alarm, Latching alarm, Holding alarm and Latching/Holding alarm.
See
for descriptions of these alarm modes.
Section 3-8
A deviation band alarm presets two reference levels relative to the set point.
There are two types of deviation band alarms which can be configured. These
are deviation band high alarm (A1FN or A2FN select DB.HI) and deviation
band low alarm ( A1FN or A2FN select DB.LO ).
Trigger levels of a deviation band alarm move with the set point. For alarm 1,
the trigger level=SP1±A1DV. For alarm 2, the trigger level=SP1±A2DV.
One of 4 different of alarm modes can be selected for alarm 1 and alarm 2. These
are : Normal alarm, Latching alarm, Holding alarm and Latching/Holding alarm.
See
for descriptions of these alarm modes.
Section 3-8