Mitsubishi Electric MELSEC Q Series Reference Manual page 94

3 SPECIFICATIONS
Remote master station
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(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
Remote I/O station
X
Y
B
B
W
W
· · · · Location of storage
MELSEC-Q
All points off
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