Processing Times Of The Basic Model Qcpu; Scan Time Structure - Mitsubishi Electric MELSEC-Q Series User Manual

11 PROCESSING TIMES OF THE BASIC MODEL QCPU

11 PROCESSING TIMES OF THE BASIC MODEL QCPU
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11.1 Scan Time Structure

STOP/PAUSE status
STOP/PAUSE processing
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This chapter describes the concept of the processing times of the Basic model QCPU.
In the RUN status, the Basic model QCPU performs the following processings
cyclically.
Processing in RUN status
Sequence program check
I/O refresh
END processing of DUTY instruction
(No processing when the DUTY
instruction is not executed)
Sequence program execution
Has the sequence program ended?
YES
MELSECNET/H refresh
CC-Link refresh
Refresh based on the intelligent
function module parameters set using
GX Configurator
Calendar update processing
(No processing when the update
command is not given)
Error cancel
(No processing when the cancel
command is not given)
Service processing
Constant wait processing
(No processing when there is no setting)
WDT reset
Scan time calculation
Operating status judgment
RUN status
Hardware, system information
check (update)
Numerals in parentheses indicate the item numbers in Section 11.2.
(1) I/O refresh time
(2) Processing time for
instruction processed at END
(3) Instruction execution time
NO
(4) Module refresh time
(5) Execution times of various
functions processed at END
(6) Service processing time
(7) Common processing time
MELSEC-Q
Scan time
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