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3 10 Deviation Alarm3 10 Deviation Alarm
A1FN = DE.HI, A1MD = NORM, SP1 = 100, A1DV=10, A1HY=4A1FN = DE.HI, A1MD = NORM, SP1 = 100, A1DV=10, A1HY=4
A1FN = DE.HI, A1MD = LTCH, SP1 = 100, A1DV=10, A1HY=4A1FN = DE.HI, A1MD = LTCH, SP1 = 100, A1DV=10, A1HY=4
A1HY = DE.LO, A1MD = HOLD, SP1 = 100, A1DV= -10, A1HY=4A1HY = DE.LO, A1MD = HOLD, SP1 = 100, A1DV= -10, A1HY=4
112
112
100
100
100
100
100
100
100
112
112
112
112
112
112
112
112
108
108
92
92
92
92
92
92
92
108
108
108
108
108
108
108
108
100
100
88
88
88
88
88
88
88
100
100
100
100
100
100
100
100
ON
ON
ON
OFF
OFF
Process proceedsProcess proceeds
Process proceedsProcess proceeds
Process proceedsProcess proceeds
Process proceedsProcess proceeds
Examples:
Figure 3.9
Normal Deviation Alarm
Figure 3.9
Normal
Deviation Alarm
Figure 3.10
Latching Deviation Alarm
Figure 3.10
Latching
Deviation Alarm
Figure 3.11 Holding
Deviation Alarm
Figure 3.11 Holding
Deviation
Alarm
2 Types of Deviation Alarms :
DE.HI, DE.LO
2 Types of Deviation Alarms :
DE.HI,
DE.LO
Deviation Alarm 1
Setup : A1FN, A1MD
Adjust : SP1, A1DV, A1HY
Trigger levels=SP1+A1DV 1/2A1HY
Deviation Alarm 1
Setup
: A1FN, A1MD
Adjust
: SP1, A1DV, A1HY
Trigger
levels=SP1+A1DV 1/2A1HY
Deviation Alarm 2 :
Setup : OUT2, A2FN, A2MD
Adjust : SP1, A2DV, A2HY
Trigger levels=SP1+A2DV 1/2A2HY
Deviation Alarm 2 :
Setup
: OUT2, A2FN, A2MD
Adjust
: SP1, A2DV, A2HY
Trigger
levels=SP1+A2DV 1/2A2HY
OUT2 can be configured as alarm 2 by selecting=AL2. If OUT2 selects=AL2,
then output 2 will perform alarm 2 function. Now A2FN can't be selected with
NONE, otherwise will appear.
A deviation alarm alerts the user when the process deviates too far from set
point. The user can enter a positive or negative deviation value (A1DV, A2DV)
for alarm 1 and alarm 2. A hysteresis value (A1HY or A2HY) can be selected to
avoid interference problem of alarm in a noisy environment. Normally, A1HY
and A2HY can be set with a minimum (0.1) value.
Trigger levels of alarm are moving with set point.
For alarm 1, Trigger levels=SP1+A1DV 1/2 A1HY.
For alarm 2, Trigger levels=SP1+A2DV 1/2 A2HY.
A1SP and/or A2SP are hidden if alarm 1 and/or alarm 2 are set with deviation
alarm. One of 4 kinds 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.
Er06
Section 3-9
OUT2 can be configured as alarm 2 by selecting=AL2. If OUT2 selects=AL2,
then
output 2 will perform alarm 2 function. Now A2FN can't be selected with
NONE,
otherwise will appear.
A
deviation alarm alerts the user when the process deviates too far from set
point.
The user can enter a positive or negative deviation value (A1DV, A2DV)
for
alarm 1 and alarm 2. A hysteresis value (A1HY or A2HY) can be selected to
avoid
interference problem of alarm in a noisy environment. Normally, A1HY
and
A2HY can be set with a minimum (0.1) value.
Trigger
levels of alarm are moving with set point.
For
alarm 1, Trigger levels=SP1+A1DV 1/2 A1HY.
For
alarm 2, Trigger levels=SP1+A2DV 1/2 A2HY.
A1SP
and/or A2SP are hidden if alarm 1 and/or alarm 2 are set with deviation
alarm.
One of 4 kinds 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.
Er06
Section 3-9
A1HY= DE.LO, A1MD = LT.HO, SP1 = 100, A1DV= -10, A1HY=4A1HY= DE.LO, A1MD = LT.HO, SP1 = 100, A1DV= -10, A1HY=4
100
100
100
100
100
100100
92
92
92
92
92
92
92
88
88
88
88
88
88
88
ON
Figure 3.12
Latching /Holding
Deviation Alarm
Figure 3.12
Latching
/Holding
Deviation
Alarm
50
Error CodeError Code