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(b) Operation when "Specify service process execution counts." is selected
1) Operation when 1 time is set
Program execution
END processing
Program execution
END processing
Program execution
END processing
2) Operation when 2 times is set
Program execution
END processing
Program execution
END processing
●
When several devices are connected to one CPU module, each device requests service processing.
When the CPU module receives requests from several devices simultaneously, a single END processing can accept
several requests simultaneously if the service processing count is set to the number of connected devices. This
improves response performance. (Note that the scan time increases by the service processing time.)
●
If no request data exists when setting the service processing count, END processing speeds up by the request
processing time. (The CPU module does not wait for requests.)
Request 1
Regardless of request data size, one request
is processed at one END processing.
Request 2
Even if the program execution time are the same,
the scan time depends on service processing time.
Request 3
Figure 6.98 Operation when 1 time is set
Request 1
Regardless of request data size,
Request 2
two requests are processed at
one END processing.
Request 3
Request 4
Figure 6.99 Operation when 2 times is set
CHAPTER6 FUNCTIONS
GX Developer
GX Developer
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