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Explanations of PLC Setup Settings Section 7-2
Note The power OFF detection delay time setting cannot be changed while the
CPU Unit is in RUN mode or MONITOR mode.
Note The execution time for the power OFF interrupt task must be less than the
maximum time available, namely: 10 ms – power OFF detection delay time.
Refer to
10-3 Power OFF Operation for details on CPU Unit operation when
power is turned OFF.
Special I/O Unit Cyclic
Refreshing
When a Special I/O Unit will be refreshed in an interrupt task by IORF(097),
always disable cyclic refreshing for that Unit with this setting. The expected
results will not be achieved and the Interrupt Task Error Flag (A40213) will be
turned ON if IORF(097) is executed in an interrupt task during normal I/O
refreshing.
Note Whenever disabling a Special I/O Unit’s cyclic refreshing, be sure that the I/O
for that Unit is refreshed with IORF(097) in the program at least every 11 sec-
onds during operation. A CPU Unit service monitoring error will occur in the
Special I/O Unit if it is not refreshed every 11 seconds.
100 V
85 V
Power Interrupt Detection Time
AC power supply: 10 to 25 ms
(not consistent)
Power interrupt
detection time
Power OFF
detection
delay time
0 to 10 ms
Regular program
Time
Power OFF
interrupt task
Stop
Special I/O Unit
CPU Unit
Special
I/O Unit
Area
These settings determine whether or not
data will be exchanged with the 10 words
allocated to each Special I/O Unit in the
Special I/O Unit Area during cyclic I/O
refreshing.
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