42
1 RUNNING A PROGRAM
1.2 Scan Time
Accuracy of constant scan
The accuracy of the constant scan is 0.01ms. However, if processing, which should be executed during the waiting time from
the completion of the END processing to the start of the next scan, is being executed, the constant scan cannot finish even if
the constant scan time is reached. The constant scan may increase by the program execution time of the interrupt factor.
( Page 42 Precautions)
Precautions
Processing of the program is stopped during the waiting time from the time the END processing is completed for the program
until the next scan starts. If any of the following processing requests is received during the waiting time, the corresponding
processing is executed.
• Interrupt program
• Fixed scan execution type program
• Event execution type program which uses occurrence of an interrupt as a trigger
• Device/label access service processing
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