Mitsubishi Electric MELSEC FX2N-2LC User Manual page 50

FX2N-2LC Temperature Control Block
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
Alarm set
value
Temperature
set value (SV)
Alarm status
Upper/lower limit deviation alarm
When the absolute deviation (=
alarm set value, an alarm is issued.
For example, if the alarm set value is "+10
(PV) is outside the range from "set value (SV) + 10
Measured value (PV)
Alarm set
Temperature
set value (SV)
Alarm set
Alarm status
Range alarm
When the absolute deviation (=
set value, an alarm is issued.
For example, if the alarm set value is "+10
(PV) is inside the range from "set value (SV) + 10
Measured value (PV)
Alarm set
Temperature
set value (SV)
Alarm set
Alarm status
Measured value
(PV)

value
value

Measured value (PV) - Set value (SV)
value
value
Measured value
(PV)
Temperature
set value (SV)
Devia
tion
Alarm set value
Time
Alarm status
Measured value (PV) - Set value (SV)
°
C", an alarm is issued when the measured value
°
C" to "set value (SV) - 10
Measured value (PV)
°
C", an alarm is issued when the measured value
°
C" to "set value (SV) - 10
Measured value (PV)
< When the deviation is negative >
(PV)
Measured value
(PV)
Non-alarm
status

) is more than the
Deviation
Deviation
Time
Non-alarm status
Alarm status

) is less than the alarm
°
Deviation
Deviation
Time
Non-alarm status
Alarm status
Alarm 6
Devia
tion
Time
Alarm
status
°
C".
C".
6-4