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MELSEC-Q
3 SPECIFICATIONS
(3) Link data when communication error station/communication stop
station has occurred
If a data link communication error or communication stop occurs on a remote I/O
station, the master station holds the data (X, B, W) received from the remote I/O
station immediately before the error.
The remote I/O station output (Y) is set to all points off.
(A communication stop station is a station that has had its cyclic transmission
stopped by peripheral equipment.)
X
Y
B
B
W
W
X
Y
B
B
W
W
Remote master station Remote I/O station
All points off
· · · · Location of stora
g
e