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3.13 Execution Time Measurement
This function displays the processing time of the program being executed.
(1) Applications and types
This function can be used to know the effect of processing time of each program on the total scan time when the
system is adjusted.
There are following three types.
• Program monitor list : Page 180, Section 3.13.1
• Interrupt program list monitor : Page 180, Section 3.13.2
• Scan time measurement : Page 181, Section 3.13.3
3.13.1 Program monitor list
The scan time, number of execution times, and processing time by item can be displayed for each program.
(1) Execution
For how to execute the program monitor list, refer to the following.
Operating manual for the programming tool used
(2) Precaution
(a) When the POFF instruction is in the program
When the POFF instruction is executed, a non-execution processing is performed for one scan. The number of
executions includes the executions of non-execution processing. For details of the POFF instruction, refer to
the following.
MELSEC-Q/L Programming Manual (Common Instruction)
3.13.2 Interrupt program monitor list
This function displays the number of interrupt program executions. This function is used to check the execution status
of an interrupt program.
(1) Execution
For how to execute the interrupt program monitor list, refer to the following.
Operating manual for the programming tool used
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