4.A2CCPU
--------------------
MELSEC-A
(2) Status of devices in
the
offline state
(a) The ON/OFF state
that
exists before just before the offline state is
established is retained.
The
device
status
in
the
offline
state
(offline
switch
opened)
is I
described below.
(b) When a forced set/reset is conducted
using
a peripheral in
the
offline state, the reset/set state afterthe forced set/reset is retained.
(3) Operation procedure
(a) To set the A2CCPU in
the
offline state, set
the
offline switch with a
peripheral device.
(b) To return the A2CCPU back from
the
offline state to the online state,
use either of the following two methods.
1) Reset
the
offline switch setting with a peripheral device.
2) Reset the A2CCPU with the
RUN key-switch.
POINTI
(1) Devices set in the offline state
cannot
be
turned
ON/OFF with a
sequence program.
The devices set in the offline state
during
testing must be returned to
the
online state by resetting
the
offline switch after
the
completion of
test operation.
(2) The devices returned from
the
offline state to
the
online state can be
turned
ON/OFF with a peripheral device.
Before returning these devices to
the
online state, check
the
input
conditions of an OUT instruction. Return to the online state after
making sure
that
no problems will arise when
the
devices are returned
to
the
online state.
•
4-34
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