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Example of Ladder Programming for Remote I/O Communications Section 4-6
Note Even if there is a communications error with the slave, the slave input data is
saved in the allocated area.
To prevent operating errors, make the ladder program so that no slave I/O pro-
cessing will occur when the Unit Error Flag (word n+10, bit 00) is ON.
I/O Data Communications
Flag (word n+12, bit 15)
Unit Error Flag
(word n+10, bit 00)
Slave I/O processing