User`s manual

191
CHAPTER 4 RECEIVING DATA WITH AN INTERRUPT PROGRAM
4
4.4 Programming
(6) After the power supply turns from OFF to ON or the programmable controller
CPU is reset, data cannot be received because the interrupt program is
invalidated during the initial processing of the programmable controller CPU.
For asynchronous data communication with the Q series C24 from the external
device without communication procedure setting, read the data as shown in
the following program.
When the input/output signals of the Q series C24 are X/Y00 to X/Y1F
Normal completion processing
Abnormal completion processing
After RUN, 1 scan only INPUT
instruction execution
CH1 error information is
initialized
Received interrupt program
execution