Mitsubishi MELSEC-A Series Reference Manual page 275

9. PROGRAMMING
[Program example No.2]..... Data link between the master station and a remote I/O station
Master station program
When X0 (X6D0 of master station) of remote I/O station No.1 is turned ON, Y120
(Y7F0 of the master station) of remote I/O station No.1 and Y170 (Y670 of the
master station) of remote I/O station No.4 flash every 1 second.
In addition, flashing stops when X0 (X500 of the master station) of remote I/O
station No.4 is turned ON.
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