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10 CONSTANT SCAN
10.1 Constant scan settings
10 CONSTANT SCAN
Since the processing time differs as per the execution/non-execution of command used in the program, the scan timer
changes with every scan. By setting the constant scan, because a program can be repeatedly executed while keeping scan
time at a specified amount of time, even when the execution time of the program changes, the I/O refresh interval can be
constant.
• When constant scan is set (Settings value=10 ms)
• When constant scan time is not set
10.1 Constant scan settings
Sets the constant scan setting.
Navigation window [Parameter] [FX5UCPU] [CPU Parameter] "RAS Setting" "Constant Scan Setting"
Window
Displayed items
Item Description Setting range Default
Constant Scan Sets the constant scan time. 0.2 to 2000 ms (0.1 ms units)
END
1 ms
7 ms
2 ms 1 ms
8 ms
1 ms 2 ms
7 ms
10 ms10 ms10 ms
1 ms
END END END00 00
Program
Wait time
END processing
END
1 ms
7 ms
1 ms
8 ms
2 ms
7 ms
9 ms9 ms8 ms
END END00 0
Program
END processing