Mitsubishi Q Series

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4 SFC PROGRAM CONFIGURATION

MELSEC-Q

POINTS

The following cannot be specified for the SFC information devices.

• Indirect designation (@)

• Digit designation (K)

• Index qualification (Z)

• Word device bit designation (.)

Main Page

Revisions4
Table of Contents6
About Manuals9
- SFC Program12
SFC (MELSAP-L) Features13
Performance Specifications Related to SFC Programs22
Performance Specifications of High Performance Model QCPU, Process CPU Redundant CPU and Universal Model QCPU24
Device List28
Device List of High Performance Model QCPU, Process CPU, Redundant CPU and Universal Model QCPU30
Processing Time33
- Processing Time for S(P).SFCSCOMR Instruction and S(P).SFCTCOMR Instruction37
Calculating the SFC Program Capacity38
List of SFC Diagram Symbols41
Steps43
- Initial Step46
- Dummy Step47
- Operation HOLD Step (with Transition Check) ST51
- Block START Step (with END Check)54
- Block START Step (Without END Check)56
- End Step58
- Instructions that Cannot be Used with Operation Outputs60
Transition61
- Serial Transition62
- Selection Transition64
- Parallel Transition67
- Jump Transition71
- Precautions for Creating Operation Output (Step)/Transition Condition Programs72
Controlling SFC Programs by Instructions (SFC Control Instructions)76
- Step Operation Status Check Instructions (A, B, &A, &B, La, Lb)80
- Forced Transition Check Instruction (A, B, &A, &B, La, Lb)83
- Block Operation Status Check Instruction (A, B, &A, &B, La, Lb)85
- Active Step Batch Readout Instructions (MOV, DMOV)87
- Active Step Batch Readout (BMOV)90
- Block START & END Instructions (S, R)93
- Block STOP and RESTART Instructions (PAUSE, RSTART)94
- Step START and END Instructions (S, R)97
- Forced Transition EXECUTE & CANCEL Instructions (S, R)101
- Active Step Change Instruction (SCHG)103
- Block Switching Instruction (BRSET)104
SFC Information Devices106
- Block START/END Bit108
- Step Transition Bit110
- Block STOP/RESTART Bit112
- Block STOP Mode Bit115
- Continuous Transition Bit118
- Number of Active Steps" Register120
Step Transition Watchdog Timer121
SFC Operation Mode Setting123
- SFC Program Start Mode124
- Block 0 START Condition126
- Output Mode at Block STOP127
- Periodic Execution Block Setting129
- Operation Mode at Double Block START130
- Operation Mode at Transition to Active Step (Double Step START)131
SFC Comment Readout Instruction134
- SFC Comment Readout Instruction (S(P). SFCSCOMR)135
- SFC Transition Comment Readout Instruction (S(P). SFCTCOMR)142
Whole Program Processing of Basic Model QCPU149
- Whole Program Processing of High Performance Model QCPU, Process CPU, Redundant CPU and Universal Model QCPU150
- Execution Type Designation by Instructions152
- SFC Program for Program Execution Management154
SFC Program Processing Sequence156
- Block Execution Sequence158
- Step Execution Sequence159
- Continuous Transition ON/OFF Operation160
SFC Program START and STOP163
- SFC Program Resumptive START Procedure164
Block START and END166
- Block END Methods167
Block Temporary Stop and Restart Methods168
- Restarting a Stopped Block171
Step START (Activate) and END (Deactivate) Methods173
- Step END (Deactivate) Methods174
- Changing an Active Step Status (Cannot be Used for Basic Model QCPU and Universal Model QCPU)175
Operation Methods for Continuous Transition176
Operation at Program Change177
APPENDIX 1 Special Relay and Special Register List180
- Special Relays (SM)181
- Special Registers (SD)185
- APPENDIX 2 Restrictions and Alternative Method of the Basic Model QCPU and187
- Step Transition Watchdog Timer Replacement Method187
- Periodic Execution Block Replacement Method188
- Forced Transition Bit (Trn) Replacement Method189
- Active Step Change Instruction (SCHG) Replacement Method190

Mitsubishi Q Series

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