Bfm #76: Alarm 1/2/3/4 Dead Zone Setting - Mitsubishi Electric MELSEC FX2N-2LC User Manual

FX2N-2LC Temperature Control Block
7.2.35

BFM #76: Alarm 1/2/3/4 dead zone setting

In BFM #76, set the dead zone of alarms 1 to 4. This setting is applied to all of alarms 1 to 4.
When the measured value (PV) is near the alarm set value, the alarm status and the non-
alarm status may be repeated by fluctuation in inputs. In order to cope with such a case, by
setting the alarm dead zone, repeating of the alarm status and the non-alarm status can be
prevented.
The allowable set range is the input range (from 0.0 to 10.0%.)
Upper limit input value alarm and upper limit deviation alarm
Measured value (PV)
Alarm set value
Alarm status
Lower limit input value alarm and lower limit deviation alarm
Measured value (PV)
Alarm set value
Alarm status
Upper/lower limit deviation alarm
Measured value (PV)
Alarm set
value
Temperature
set value (SV)
Alarm set
value
Alarm status
Measured value (PV)
Dead zone
Time
Measured value (PV)
Dead zone
Time
Measured value (PV)
Non-alarm status
Buffer Memory (BFM) 7
Non-alarm status
Alarm status
Non-alarm status
Alarm status
Dead
zone
Dead
zone
Time
Alarm status
7-25
7