How is it converted into a ladder diagram, and then into logic instructions controlled by the PLC? To explain this change more clearly and intuitively, we will take the simplest example: a button interlock forward and reverse control circuit.
I. Electrical Control Section
1. Reasons for introducing the button interlock forward/reverse control circuit
2. Main circuit for push-button interlock forward/reverse control
3. Control circuit for push-button interlock forward and reverse control
4. Functions of the components in the button interlock forward/reverse control circuit
5. Working principle of the button interlock forward and reverse control circuit
6. Various protection measures for the button interlock forward and reverse control circuit
7. Advantages and disadvantages of push-button interlock forward/reverse control circuit
8. Wiring diagram of the button interlock forward/reverse control circuit
II. PLC Conversion Section
1. I/O allocation design
2. PLC hardware connection and external wiring
3. PLC ladder diagram
4. Logic instructions converted from ladder diagrams
Electrical control circuits are the foundation for PLC to perform its functions, and familiarity with circuit diagrams is the basis for learning PLC! The conversion of circuit diagrams to logic instructions can be analyzed step by step when learning, from simple to complex, starting with the easy and progressing to the difficult, and the analysis methods are similar.
