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10.1 Scan Time
10.1.1 Scan time structure
10
CPU MODULE PROCESSING TIME
(2) Scan time structure of High Performance model QCPU or Process CPU
* 1 : Program end indicates the timing when the END, GOEND, FEND or STOP instruction is executed.
* 2 : Indicates a calendar update or error clear.
Diagram 10.2 Scan time structure of High Performance model QCPU or Process CPU
Processing in RUN status
Program check
I/O refresh
Program execution
NO
YES
MELSECNET/H refresh
CC-Link refresh
Low speed program execution
(executed only for free time)
Constant wait processing
(No processing performed when not set)
WDT reset
scan time calculation
STOP/PAUSE processing
RUN status
STOP/PAUSE status
Refresh by intelligent function module
parameter set on GX Configurator
Various function compatibility processing 2
Common processing time
( Section 10.1.2 (9))
Low speed program operation
time ( Section 10.1.2 (8))
Module refresh time
( Section 10.1.2 (6))
Common
END
processing
time
Execution time of various
functions processed at END
( Section 10.1.2 (5))
Instruction execution time
( Section 10.1.2 (4))
I/O refresh time
( Section 10.1.2 (1))
END processing time and
the relevant
instruction
( Section 10.1.2 (3))
END processing of DUTY instruction
(No processing performed
when DUTY instruction is not executed)
Service processing
Service processing time
( Section 10.1.2 (7))
Is program terminated?" 1
Scan time
Operation status identification
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