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CHAPTER10 CPU MODULE PROCESSING TIME
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10.1 Scan Time
10.1.1 Scan time structure
(2) Scan time structure of the High Performance model QCPU and Process CPU
*1: End of a program indicates the timing when the END, GOEND, FEND, or STOP instruction is executed.
Figure 10.2 Scan time structure of the High Performance model QCPU and Process CPU
STOP/PAUSE status
STOP/PAUSE processing
Calendar update, error clear
NO
YES
Operating status check
RUN status
Common processing time
Common
END
processing
time
Scan
time
Instruction execution time
( )
( )
( )
( )
( )
( )
( )
( )
Processing in the
RUN status
Program check
I/O refresh
Execution of the DUTY instruction in END
processing (no execution when the DUTY
instruction is not used)
Program execution
End the program?
*1
Refresh via MELSECNET/H
Refresh via CC-Link IE
Controller Network
Refresh via CC-Link
Refresh by the intelligent function module
parameters set in GX Configurator
Service processing
Low-speed execution type
program exaction
Processing during the constant scan
waiting time (no processing when the
constant scan time is not set)
WDT reset, scan time calculation
I/O refresh time
Instruction execution time in END processing
Module refresh time
Function execution time in END processing
Service processing time
Low-speed execution type program operating
time
Section 10.1.2(1)
Section 10.1.2(3)
Section 10.1.2(4)
Section 10.1.2(5)
Section 10.1.2(8)
Section 10.1.2(6)
Section 10.1.2(7)
Section 10.1.2(9)