Mitsubishi EMU4-BM1-MB User Manual page 28

7.2.2 How to use upper/lower limit alarm function
This device can set the upper/lower limit alarm value for each measured value individually.
< Monitoring items >
Upper limit alarm items
Lower limit alarm items
< Alarm setting >
・Upper limit value Set the upper limit of measured value. For setting value and setting range,
・Lower limit value Set the lower limit of measured value. For setting value and setting range,
・Alarm delay time Set the value in case you want to remove the inrush current of the load, etc. from the objects of
monitoring. Alarm does not occur when the measured value goes below the upper limit or goes over the
lower limit within the configured time. For setting value and setting range,
・Alarm reset method
Reset method
Auto-reset (Auto)
Self-retention (Hold)
For setting alarm reset operation
manual (detail).
< Alarm occurrence / recovery condition >
Alarm item
Current demand
Line voltage
Phase voltage
Electric power demand
Power factor
Phase N current demand
Current unbalance rate
Voltage unbalance rate
Pulse conversion
Caution: Since the measured value of pulse count value is an integrated value, it does not decrease.
When an alarm occurs, it is necessary to satisfy the recovery condition by one of the following methods.
・Reset Pulse count
・Preset Pulse count less than setting value of upper limit alarm
・Setup upper limit alarm more than pulse count
Current demand, Line voltage, Phase voltage, Electric power demand, Power
factor, N phase current demand, Pulse converted, Current unbalance rate,
Voltage unbalance rate
Current demand, Line voltage, Phase voltage, Electric power demand, Power
factor,
Alarm recovery operation is different according to the alarm reset method.
Alarm recovery operation
Reset the alarm automatically if the measured value goes below the
upper limit or goes over the lower limit.
The alarm is held after the measured value goes below the upper limit or
goes over the lower limit. Alarm is cleared by alarm reset.
6.1.12 Upper and lower alarm setting. Please reference to display unit instruction
Alarm reset
method
Upper limit
alarm
Auto-reset
(Auto)
Lower limit
alarm
Upper limit
monitoring
Self-retention
(Hold)
Lower limit
monitoring
Auto-reset Upper limit
(Auto) monitoring
Self-retention Lower limit
(Hold) monitoring
6.1.12 Upper and lower alarm setting
6.1.12 Upper and lower alarm setting
6.1.12 Upper and lower alarm setting
Alarm status Alarm occurrence / recovery condition
Measured value > configured upper limit
Occurrence
(Alarm delay time is available)
Recovery Measured value < configured upper limit
Measured value < configured lower limit
Occurrence
(Alarm delay time is available)
Recovery Measured value > configured lower limit
Measured value > configured upper limit
Occurrence
(Alarm delay time is available)
Retention Measured value ≤ configured upper limit
Measured value < configured upper limit
Recovery
Measured value < configured lower limit
Occurrence
(Alarm delay time is available)
Retention Measured value ≥ configured lower limit
Measured value > configured lower limit
Recovery
Occurrence Measured value ≥ configured upper limit
Recovery Measured value < configured upper limit
Occurrence Measured value ≥ configured upper limit
Recovery Measured value < configured upper limit
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AND
Alarm reset
AND
Alarm reset