476
Power Interruptions
Section 7-2
2.
A power interruption may or may not be detected for a power interruption
that lasts more than 10 ms but less than 25 ms for AC power supply, or
more than 5 ms but less than 25 ms for DC power supply, i.e., the system
may continue or it may stop.
3.
The system will stop unconditionally if the power interruption lasts more
than 25 ms for either AC or DC power supply.
85% of the rated voltage or less
Power supply
voltage
AC: 0 to 10 ms
DC: 0 to 5 ms
Power interruption
not detected; op-
eration continues.
Operation will continue or
stop depending on whether
or not the power interrup-
tion is detected.
Power interruption detected and opera-
tion stops.
Time
Power supply
voltage
AC: 10 to 25 ms
DC: 5 to 25 ms
25 ms and longer
Power supply
voltage
AC: 10 ms
DC: 5 ms
25 ms
85% of rated
voltage
Power OFF
detected signal
Program execution
CPU reset signal
Power OFF
Detection Time
AC: 5 to 10 ms
DC: 10 to 25 ms
Operation always stopped
at this point regardless.
Executed
Stopped
5-V internal
power supply
Power OFF detected
