c-
4.
A2CCPU
/MELSEC-A
(3)
Caution
7-
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(a) The constant scan time setting value stored
in
09020 is
cleared to zero
(0)
when the A2CCPU is powered up
or
reset using the RUN switch.
TherefoM,
it
is necessary to write the following program
if
constant scan is required from the first scan immediately
after the AZCCPU is started
or
reset.
c/
Normally
ON
contact
Constant scan time setting value
(b)
If
a
momentary power failure of less than 20 msec has
occurred, the constant scan time is lengthened according-
ly.
In
this case, the constant scan function is not executed
correctly.
(c)
If
a peripheral device is connected to the A2CCPU, the set
scan time is lengthened by the time (0.2 msec) required for
communication between the A2CCPU and the peripheral
device.
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