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3 14 Sensor Break Alarm
3 14 Sensor Break Alarm
Alarm 1 or alarm 2 can be configured as sensor break alarm by selecting SENB
Alarm 1 or alarm 2 can be configured as sensor break alarm by selecting SENB
for A1FN or A2FN. If alarm 2 is required for sensor break alarm, then
for A1FN or A2FN. If alarm 2 is required for sensor break alarm, then
OUT2 should be selected with =AL2.
OUT2 should be selected with =AL2.
The sensor break alarm is activated as soon as failure mode occurs. Refer to
The sensor break alarm is activated as soon as failure mode occurs. Refer to
Section 3-17
Section 3-17
for failure mode conditions. Note that
for failure mode conditions. Note that
sensor break alarm. TIME,A1SP , A1DV, and A1HY are hidden if alarm 1 is
sensor break alarm. TIME,A1SP , A1DV, and A1HY are hidden if alarm 1 is
configured as a sensor break alarm. Similarly, TIME, A2SP , A2DV and A2HY are
configured as a sensor break alarm. Similarly, TIME, A2SP , A2DV and A2HY are
hidden if alarm 2 is configured as a sensor break alarm.
hidden if alarm 2 is configured as a sensor break alarm.
One of 4 kinds of alarm modes can be selected for sensor break alarm. These
One of 4 kinds of alarm modes can be selected for sensor break alarm. These
are: Normal alarm, Latching alarm, Holding alarm and Latching/Holding alarm.
are: Normal alarm, Latching alarm, Holding alarm and Latching/Holding alarm.
However, the Holding alarm and Latching/Holding alarm are not recommended
However, the Holding alarm and Latching/Holding alarm are not recommended
to be chosen for sensor break alarm
to be chosen for sensor break alarm
holding function even if it is set with holding or latching/holding mode.
holding function even if it is set with holding or latching/holding mode.
Section 3-9
Section 3-9
for the descriptions of these alarm modes.
for the descriptions of these alarm modes.
3 15 SP1 Range
3 15 SP1 Range
SP1L ( SP1 low limit value ) and SP1H ( SP1 high limit value ) in setup menu
SP1L ( SP1 low limit value ) and SP1H ( SP1 high limit value ) in setup menu
are used to confine the adjustment range of SP1.
are used to confine the adjustment range of SP1.
Example : A freezer is working in its normal temperature range -10 C to -15 C.
Example : A freezer is working in its normal temperature range -10 C to -15 C.
In order to avoid an abnormal set point, SP1L and SP1H are set with the
In order to avoid an abnormal set point, SP1L and SP1H are set with the
following values:
following values:
SP1L = -15 C
SP1L = -15 C
Now SP1 can only be adjusted within the range from -10 C to -15 C.
Now SP1 can only be adjusted within the range from -10 C to -15 C.
54
since sensor break alarm will not perform
since sensor break alarm will not perform
SP1H = -10 C
SP1H = -10 C
IN1H ( or sensor range high )
IN1H ( or sensor range high )
SP1H
SP1
SP1L
IN1L ( or sensor range low )
IN1L ( or sensor range low )
A-D failure
A-D failure
also creates a
also creates a
See
See
UM25001C
Sensor Break Alarm 1
Sensor Break Alarm 1
Setup:
Setup:
A1FN=SENB
A1FN=SENB
A1MD=NORM, LTCH
A1MD=NORM, LTCH
Hidden:
Hidden:
TIME, A1SP , A1DV
TIME, A1SP , A1DV
A1HY
A1HY
Sensor Break Alarm 2
Sensor Break Alarm 2
Setup:
Setup:
OUT2= =AL2
OUT2= =AL2
A2FN=SENB
A2FN=SENB
A2MD=NORM, LTCH
A2MD=NORM, LTCH
Hidden:
Hidden:
TIME , A2SP , A2DV
TIME , A2SP , A2DV
A2HY
A2HY
Setup : SP1L, SP1H
Setup : SP1L, SP1H
Figure 3.19 SP1 Range
Figure 3.19 SP1 Range
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