Mitsubishi MELSEC-Q Series Programming Manual page 180

5 SFC PROGRAM PROCESSING SEQUENCE
(2) High Performance model QCPU, Process CPU, Redundant CPU, Universal
model QCPU, LCPU, and QnACPU
The High Performance model QCPU, Process CPU, Redundant CPU, Universal model QCPU,
LCPU, and QnACPU can store multiple programs in the program memory and execute them.
(Scan execution is enabled for two SFC programs (one SFC program for program execution
management and one normal SFC program). *1
Multiple programs are executed in the order of the program setting in the PLC parameter
dialog box.
The execution status of multiple programs is shown below under the following conditions.
[Condition]
1) Program setting in PLC parameter dialog box
1: ABC (sequence)
2: DEF (SFC)
3: XYZ (sequence)
2) Low speed program time setting in parameter: 5ms
3) SFC program: Set to Auto START ON
[Program execution]
STOP RUN
Power ON RUN
END
processing
Scan
0
Program
ABC
Program
DEF
Program
XYZ
REMARKS
• 1: For the Universal model QCPU and LCPU, only one SFC program (one normal SFC
program) can be scanned.
• Refer to Section 6.1 for the SFC program start/stop method.
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<scan>
<scan>
<low speed>
END
0
Scan
SFC program
execution
Low
speed
Scan
END
Scan
SFC program
execution
Low
speed
Scan time
Scan
END
0
Scan
SFC program
execution
Scan
0
Low
speed
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