Bfm#234] Alarm Delay Count - Mitsubishi Electric MELSEC FX Series User Manual

FX -4LC User's Manual
3U
Example of operation 3 (Upper/lower limit deviation)
Measured value (PV)
Alarm set value
Set value (SV)
Alarm set value
Alarm status
Caution
Handling numbers containing decimal places. The set value should be the actual value multiplied by 10.

8.2.56 [BFM#234] Alarm delay count

To this buffer memory, set the number of times of alarm delay for alarms 1 to 4.
The setting is applied to alarms 1 to 4 in all channels.
The alarm delay function keeps the non-alarm status until the number of times of input sampling exceeds the
preset number of times of alarm delay after the deviation between the measured value (PV) and the set value
(SV) reaches the alarm set value.
If the deviation remains in the alarm range until the number of times of input sampling exceeds the number of
times of alarm delay, an alarm is issued.
The input sampling period is 0.25 sec for the number of times of alarm delay.
BFM No.
CH1 CH2 CH3 CH4
#234
Example of operation (When the number of alarm delays, is set to 5 times)
Measured value (PV)
Alarm set value
Set value (SV)
Input sampling
Alarm status
114
Measured value (PV)
→ For details on the measured value (PV), refer to Subsection 8.2.3.
→ For details on the set value (SV), refer to Subsection 8.2.15.
→ For details on the alarm setting value, refer to Subsection 8.2.16.
→ For details on the alarm mode setting, refer to Subsection 8.2.53.
Description
Setting range : 0 to 30000
Measured value (PV)
3 times
→ For details on the alarm function, refer to Chapter 7.
Time
5 times
8 Buffer Memory
8.2 Buffer Memory Details
Dead zone
Dead zone
Time
Non-alarm status
Alarm status
Initial
R/W
value
0 R/W
Non-alarm status
Alarm status
Backup