Mitsubishi MELSEC-A Series Reference Manual page 274

9. PROGRAMMING
[Program example 1] ..... Data link between the master station and a local station
Master station program
Turn Y260 (X1B0 of local station No.3) ON while the T4 contact is OFF and turn
Y390 (X250 of local station No.2) ON while the T4 contact is ON.
Turn YC0 ON while X1A0 (Y210 of local station No.2) is ON, and turn YC1 ON
while X2A0 (Y300 of local station No.3) is ON.
Local station No.2 program
Turn Y1E0 ON while X250 (Y390 of the master station) is ON.
Turn Y210 (X1A0 of the master station) ON when X250 is ON for 20 times.
Local station No.3 program
Turn Y80 ON while X1B0 (Y260 of the master station) is ON.
Turn Y300 (X2A0 of the master station) ON when X1B0 is turned ON for 20 times.
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