Study SFC (IEC61131 and general internet sources), particularly: Research Divergence to OR structure and how it is used to implement transitions to other states. Research mutual exclusivity when transitioning simultaneous states. Research the Divergence to AND structure when following two sequences simultaneously. Study Sequential Tutorial, particularly: Note how you use ladder diagrams to implement state transitions State transition tables and state diagrams operation State Q1 Q2 St1_Init 0 St2_00 0 St3_01 0 1 St4_11 1 St5_10 1 0 Sequential Tutorial Reading Guide 0 0 1 T5 elapsed St5_10 RESET Q1=1, Q2=0 Enable T5 St1_Init Q1=0, Q2=0 T4 elapsed St4_11 Q1=1, Q2=1 Enable T4 ENABLE T3 elapsed St2_00 Q1=0, Q2=0 Enable T2 T2 elapsed St3_01 Q1=0, Q2=1 Enable T3
Sequential Tutorial Reading Guide
Study SFC (IEC61131 and general internet sources), particularly: Research Divergence to OR structure and how it is used to implement transitions to other states. Research mutual exclusivity when transitioning simultaneous states.
Research the Divergence to AND structure when following two sequences simultaneously
Study Sequential Tutorial, particularly:
Note how you use ladder diagrams to implement state transitions State transition tables and state diagrams operation
RESET
St1_Init
State Q1
Q2
ENABLE Q1=0, Q2=0 St2_00 T5 elapsed Q1=0, Q2=0 St5_10 Enable T2
St1_Init 0
0
St2_00 0
0
Q1=1, Q2=0 Enable T5
T2 elapsed
T4 elapsed
St3_01 0
1
St3_01
St4_11 1
St4_11
1
Q1=0, Q2=1 Enable T3 T3 elapsed
Q1=1, Q2=1 Enable T4
St5_10 1
0