Alarm Re-Wait Operation - Mitsubishi Electric MELSEC FX Series User Manual

FX -4LC User's Manual
3U
7.2.8

Alarm re-wait operation

The alarm re-wait operation ignores the alarm status of the measured value (PV) when control is started, and
disables the alarm function until the measured value (PV) enters the alarm region after the wait period has
ended.
When the set value (SV) is changed, the measured value (PV) for deviation alarm changes accordingly.
At this time, even if the measured value (PV) becomes the alarm status, the alarm re-wait function ignores it
again and disables the alarm function until the measured value (PV) goes out of the alarm status again.
Re-wait operation
Measured value (PV)
Set value (SV)2
Alarm set value
Set value (SV)1
Alarm set value
Wait operation region
Alarm status
70
Set value is changed
Wait operation region
Measured value (PV)
Deviation
Deviation
7 Alarm
7.2 Alarm Functions
Time
Non-alarm status
Alarm status