PLC glossary
Ladder
A diagram language using conditions and output instructions along paths. Read which conditions allow each path to reach its output.
- Also called
- LAD, LD, ladder logic, RLL
- On site
- An engineer checks both the Start path and the holding path before accepting a pump circuit.
- Siemens
- LAD networks with contacts, coils and instruction boxes.
- Rockwell
- Ladder rungs using instructions such as XIC, XIO and OTE.