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3. LINKING TO THE A2CCPU
MELSEC-A
POINT
If the A64RDC is reset by moving the reset switch,
it
returns to the initial
state. Execute initial setting again.
Since X(n+5) goes ON after the power is
turned ON, be sure to turn ON
Y(n+5) and OFF X(n+5) at the initial stage. Then, execute programs
for
the A64RDC.
(3)
Communications-completed response signal wait flag X(n+7)
This goes
ON when communications with the
A64RDC is started by
execution of the PRC instruction, and goes OFF when the communica-
tions-completed response signal from the A64RDC is received.
It also goes
OFF when the communications error reset signal Y(n+4)
goes ON.
PRC instruction execution
h -
Communications execution
Communications-completed
response wait flag X(n+7)
(4) Communications reset Y(n+7)
If
the communications-completed response signal for the data trans-
mitted by execution of the PRC instruction is not returned, the com-
munications reset Y(n+7) and the communications error-detection reset
Y(n+4) are turned ON simultaneously by the sequence program.
(Communications is reset to the initial state. The set data is not cleared.)
(5)
READY flag X(n+18)
This signal goes
ON
in
any
NORMAL mode(*l) (except the TEST
mode(*2)) after turning ON the power or resetting the PC CPU.
Power
Mode
NORMAL
OFFSET/GAIN
setting switch
OFFSET
READY flag X(n+l8)
OFF
3 - 10
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