469
APPENDICES
A
Appendix 3 CPU Module Processing Time
Appendix 3.1 Scan time structure
Appendix 3 CPU Module Processing Time
This chapter describes the CPU module processing time.
This section describes the scan time structures and CPU module processing time.
Appendix 3.1 Scan time structure
A CPU module sequentially performs the following processing in the RUN status.
Scan time is the time required for all processing and executions to be performed.
*1 End of a program indicates the timing when the END, GOEND, FEND, or STOP instruction is executed.
STOP/PAUSE status
STOP/PAUSE
processing
NO
YES
Operating status check
RUN status
Common processing time
Instruction execution time
( )
( )
( )
( )
( )
( )
( )
Processing in the
RUN status
Program check
I/O refresh
Processing for the DUTY instruction in
END processing (no processing when
the DUTY instruction is not used)
Program execution
End the program?
*1
Refresh
MELSECNET/H
CC-Link IE
CC-Link
CC-Link IE Field Network Basic
Intelligent function module
Calendar update, error clear
Device data latch processing
Service processing
Processing during the constant scan
waiting time (no processing when the
constant scan time is not set)
WDT reset, scan time calculation
Scan
time
Common END processing time
I/O refresh time
Instruction execution time in
END processing
Refresh time
Function execution time in END
processing
Service processing time
( )
Device data latch processing
Page 470, Appendix 3.2 (1)
Page 471, Appendix 3.2 (3)
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Page 476, Appendix 3.2 (5)
Page 477, Appendix 3.2 (6)
Page 480, Appendix 3.2 (8)
Page 471, Appendix 3.2 (2)
Page 479, Appendix 3.2 (7)
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