Filter
Top Products
1 PROGRAM EXECUTION
1.1 Scan Configuration
17
1
I/O refresh
Execute I/O refresh before starting program operations.
• Input ON/OFF data input from input module/intelligent function module to CPU module
• Output ON/OFF data input from CPU module to output module/intelligent function module
When executing constant scan, I/O refresh is executed after the constant scan waiting time ends.
Program operations
Step 0 of each program up to the END/FEND instruction is executed according to program settings. This program is called the
"main routine." Main routine programs can be divided into subroutines. (Page 29 Subroutine program)
END processing
END processing involves the following processes:
• Refreshing of network modules
• Refreshing of intelligent function modules
• Instruction termination processing
• Device/label access service processing
• Resetting of the watchdog timer
• Self-diagnostic processing
• Setting of values to special relays/special registers (set timing: when END processing is executed)