Omron CJ - 08-2008 Operation Manual page 504

Power OFF Operation
85% of rated
voltage
(PD025: 80%,
PD022: 90%)
Power OFF
detected signal
Program execution
status
CPU reset signal
456
Power OFF detected
Power OFF
detection time:
AC: 10 to 25 ms
PD025: 2 to 5 ms
PD022: 2 to 10 ms
(Power OFF
undetermined)
Cyclic tasks or interrupt tasks not
associated with power OFF
Interrupt processing is performed according to the contents of A530 and the
PLC Setup as shown below.
A530
Power OFF Disabled
Interrupt Task
(PLC Setup)
Enabled
Operation always stopped at this
point regardless.
Holding time for 5 V internal power
supply after power OFF detection:
Always 10 ms (PD022: 1 ms)
Power OFF confirmed
Power OFF
Detection Delay
Time: 0 to 10 ms
(set in PLC Setup)
EI(694)
DI(693)
Instructions between
DI(693) and EI(694)
are executed.
A5A5 Hex (disabling power
interrupt processing)
All instructions between
DI(693) and EI(694) are exe-
cuted and the CPU Unit is
reset.
Execution of the current instruction is completed, the Power OFF
Interrupt Task is executed, and the CPU Unit is reset.
Section 10-3
Processing time after power
OFF is confirmed: 10 ms
minus Power OFF Detection
Delay Time
PD022: 1 ms minus Power
OFF Detection Delay Time)
Note: The interrupt task
execution time must be less
than or equal to processing
time after power OFF is
confirmed.
Stopped
Other
Execution of the current
instruction is completed and
the CPU Unit is reset.