10.1 BASIC LADDER LOGIC
The PLC can be programmed like other computers using specialized "languages."
- Ladder Logic - a programming technique using a ladder-like structure. It was originally adopted because of its similarity to relay logic diagrams to ease its acceptance in manufacturing facilities. The ladder approach is somewhat limited by the lack of loops, etc. (although this is changing).
- Mnemonic - instructions and opcodes, similar to assembly language. It is more involved to program, but also more flexible than ladder logic. This will be used with the hand held programmers.
There are other methods that are not as common,
- sequential function charts/petri nets
