Omron SYSMAC C200H-ASC02 Operation Manual page 129

PC Statements and Refresh Timing
PC OFF
After the ON PC GOSUB statement is executed, the PC's interrupt number is written in. If the PC OFF state-
ment is subsequently executed, then even if the Write flag is set, the GOSUB statement will not be executed
and the ASCII busy flag will not be set.
I/O refresh
C200H CPU
ASCII Unit
ON PC GOSUB statement execution
Interrupt number
(word n bits 04 through 07)
WRITE flag (word n bit 01)
ASCII Unit (word n+3 bit 00)
I/O refresh
Instruction execution
I/O refresh
Instruction execution
ON PC GOSUB statement execution
Appendix C
I/O refresh
Instruction execution
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