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3. LINKING TO THE A2CCPU
MELSEC-A
Table 3 . 2 List of A64RD4C Signals
I
Signal Direction
: A64RD4C
-c
A2CCPU
Unusable
FROMflO
instruction error
X(n+7)
X(n+8)
X(n+l7)
Communications-completed
response wait flag
Unusable
I
X(n+18)
I
READYflag
I
X(n+l9)
I
2
Disconnection detection flag
I
x ( ; ; 1
F)
1
Unusable
X(n+l
A)
Signal Direction
: A2CCPU
--.
A64RD4C
Device No.
Description
Y(n+O)
Y(n+3)
Y(n+4)
Errordetection reset
Y(n+5)
Reset switch ON-detect& flag
Y(n+6)
Unusable
Y(n+7)
Communications reset
to
Unusable
reset
Y(n+E)
Y(n+l
F)
to
Unusable
The A64RDC could malfunction if any of the unusable
I/O
signals is utilized
(turned ON or
OFF) in
the sequence program.
3-8
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