Upper Limit Deviation Alarm; Lower Limit Deviation Alarm; Upper/Lower Limit Deviation - Mitsubishi Electric MELSEC FX Series User Manual

FX -4LC User's Manual
3U
7.2.3

Upper limit deviation alarm

When the deviation (= Measured value (PV) - Set value (SV)) is more than the alarm set value, an alarm is
issued.
When the deviation is positive
Measured value (PV)
Alarm set value
Set value (SV)
Alarm status
7.2.4

Lower limit deviation alarm

When the deviation (= Measured value (PV) - Set value (SV)) is less than the alarm set value, an alarm is
issued.
When the deviation is positive
Measured value (PV)
Alarm set value
Set value (SV)
Alarm status
7.2.5

Upper/lower limit deviation

When the absolute deviation (= Measured value (PV) - Set value (SV)) is more than the alarm set value, an
alarm is issued.
For example, if the alarm set value is "+10 C", an alarm is issued when the measured value (PV) is outside
the range from "set value (SV) +10 C" to "set value (SV) -10 C".
Measured value (PV)
Alarm set value
Set value (SV)
Alarm set value
Alarm status
68
Measured value (PV)
Set value (SV)
Deviation
Alarm set value
Time
Alarm status
Measured value (PV)
Set value (SV)
Deviation
Alarm set value
Time
Alarm status
Measured value (PV)
When the deviation is negative
Measured value (PV)
Measured value (PV)
When the deviation is negative
Measured value (PV)
Measured value (PV)
Deviation
Deviation
Time
Non-alarm status
Alarm status
7 Alarm
7.2 Alarm Functions
Deviation
Time
Non-alarm status
Alarm status
Deviation
Time
Non-alarm status
Alarm status