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CHAPTER2 SEQUENCE PROGRAMS
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2.3 Settings When Program is Divided
2.3.3 Low-speed execution type program
(4) Settings for low-speed execution type program execution
Set the following in the PLC RAS tab of the PLC parameter dialog box.
• Constant scan time value ("Constant scanning") Setting range: 0.5 to 2000ms (in increments of 0.5ms)
• Low-speed program execution time value ("Low speed program execution time") Setting range: 1 to
2000ms (in increments of 1ms)
To execute low-speed execution type programs, make sure to set either a constant scan time value or low-speed program
execution time value.
To monitor the execution time of low-speed execution type programs, set a low-speed execution monitoring time
value.
The setting range is 10 to 2000ms (in increments of 10ms).
No default value is set.
(a) When the low-speed scan time exceeds the preset low-speed execution monitoring
time
"PRG TIME OVER" (error code: 5010) occurs.
When executing low-speed execution type programs and initial execution type programs, the low-speed execution type
programs will be executed after the completion of the initial execution type programs ( Section 2.3.1).
Set an initial execution monitoring time value which is longer than a total of the initial scan time and the execution time of
low-speed execution type programs.
Figure 2.32 PLC RAS setting (Constant scan, low-speed program execution time, and low-speed execution monitoring time)
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