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