Chapter10 Cpu Module Processing Time; Scan Time; Scan Time Structure - Mitsubishi Q00JCPU User Manual

10
CPU MODULE PROCESSING TIME

CHAPTER10 CPU MODULE PROCESSING TIME

This chapter explains the CPU module processing time.

10.1 Scan Time

This section explains the scan time structures and CPU module processing time.

10.1.1 Scan time structure

The CPU module scan time consists of the followings processings.
The CPU module performs the following processings cyclically in the RUN status.
(1) Scan time structure of Basic model QCPU
Processing in RUN status
END processing of DUTY instruction
(No processing performed
when DUTY instruction is not executed)
Is program terminated?
MELSECNET/H refresh
Refresh by intelligent function module
parameter set on GX Configurator
Calendar update processing
(No processing peformed
when there is no update direction)
(No processing performed
when there is no clear direction)
Constant wait processing
(No processing performed when not set)
WDT reset scan time calculation
STOP/PAUSE status
Operation status identification
STOP/PAUSE processing
information check (update)
1 : Program end indicates the timing when the END, GOEND, FEND or STOP instruction is executed.
Diagram 10.1 Scan time structure of Basic model QCPU
Program check
I/O refresh
Program execution
NO
1
YES
CC-Link refresh
Error clear
Service processing
RUN status
Hardware and system
10.1.1 Scan time structure
I/O refresh time
( Section 10.1.2 (1))
END processing time and
the relevant instruction
( Section 10.1.2 (3))
Instruction execution time
( Section 10.1.2 (4))
Module refresh time
( Section 10.1.2 (6))
Scan time
Execution time of various
functions processed at END
( Section 10.1.2 (5))
Service processing time
( Section 10.1.2 (7))
Common processing time
( Section 10.1.2 (9))
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10.1 Scan Time
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