Omron FQM1-CM001 Benutzerhandbuch

The above timing chart shows an example when the User-set Power OFF
Detection Time is set to 0 ms.

The following timing chart shows the Coordinator Module power OFF opera-
tion in more detail.

The time it takes to detect power OFF after the power supply falls below 85%
of the minimum rated voltage.

The time after power OFF is detected until it is confirmed. This can be set in
the System Setup within a range from 0 to 10 ms (default: 0 ms). 

If an unstable power supply is causing power interruptions, set a longer User-
set Power OFF Detection Time (10 ms max.) in the System Setup.

The maximum amount of time (fixed at 10 ms) that 5 V will be held internally
after power interruption is detected. 

10 ms

25 ms

25 ms

0

0 to 10 ms

Time

10 to 25 ms

Power supply 
voltage

Power supply 
voltage

Power supply 
voltage

Momentary power 
interruption not detected 
and operation continues.

85% of the rated voltage or less

Operation will continue or stop 
depending on whether or not a 
momentary power interruption 
is detected.

Momentary power 
interruption detected 
and operation stops.

Reset signal

Stopped

Fixed Power OFF 
Detection Time: 
Default is 10 to 
25 ms (Power OFF 
undetermined)

Holding time for 5 V internal 
power supply after power 
OFF detection: 10 ms.

Power OFF detected

Power OFF confirmed

User-set Power 
OFF Detection 
Time: 0 to 10 ms 
(set in System 
Setup)

Operation always stopped at this 
point regardless.

Processing time after 
power OFF is confirmed: 
10 ms minus User-set 
Power OFF Detection 
Time 
Note: The interrupt task 
execution time must be 
less than or equal to pro-
cessing time after power 
OFF is confirmed.

85% of rated 
voltage

Power OFF 
detected signal

Program execution 
status

Cyclic task or interrupt tasks not associated with power OFF