Omron SYSMAC CS Series Operation Manual page 208

Power Interruptions
85% of the rated voltage or less
0 ms
Power interruption not
detected; operation
continues.
Power supply
voltage
Power supply
voltage
Power supply
voltage
Power Interruption Timing Chart
85% of rated
voltage
Power OFF
detected signal
Customizable
Counter Unit
status
CPU reset signal
Note
188
AC: 10 ms
DC: 5 ms
AC: 0 to 10 ms
DC: 0 to 5 ms
Operation will continue or
stop depending on whether
or not the power interrup-
tion is detected.
Note The above description assumes that the power interrupt detection delay set in
the CPU Unit is 0 ms.
A detailed timing chart for Customizable Counter Unit power interruption is
provided below.
Internal 5-V power after interrupt
detection
Power hold time: Fixed at 10 ms
Power OFF detected
Default power inter-
Power interruption
ruption detection
detection delay: 0 to
time: 10 to 25 ms
10 ms (set in PLC
(not stable)
Setup in CPU Unit)
Normal operation
Internal standby processing
1. Depending on the slot to which the Customizable Counter Unit is mounted,
it may not be possible to complete power interruption processing correctly
(e.g., saving counter values, ending instruction execution, etc.).
2. When the Customizable Counter Unit is restarted from the CPU Unit, pow-
er interruption processing is not performed and saving counter values and
ending instruction execution will not be possible. Whenever possible, stop
the Customizable Counter Unit using the RUN/STOP Command Bit before
resetting it from the CPU Unit. (Even in this case, counter values will not
be held correctly.
25 ms
AC: 10 to 25 ms
DC: 5 to 25 ms
25 ms and longer
Power interruption detected and opera-
tion stops.
Operation always stopped
at this point regardless.
Power OFF detected
Stopped
Section 8-2
Time
Processing time after
power interrupt detection
(10 ms − power interrup-
tion detection delay)