Ladder Diagram is a visual programming language that was originally developed as a way to replace programming hard-wired relay logic.
Ladder Diagram is a visual programming language. Symbolic representations of electrical circuits are used that coincide with the schematic symbols used in conventional circuit diagrams. These symbols and connecting lines are used to program the necessary logic.
Steps for Building a Ladder Diagram:
1.Determine the No. of digital I/O
2.Determine the No. of analog I/O (if needed)
3.Determine if there are special functions in the process
4.Estimate program capacity depending on the process
5.Choose a suitable PLC series
6.Prepare the wiring diagram
7.Draw flowchart or control diagram (Optional)
8.Program the PLC using the ladder diagram
PLC Exercises Ladder Diagram Programming