| Language | Abbr. | Typical Use | |----------|-------|--------------| | Ladder Diagram | LD | Discrete logic, motor controls, safety circuits | | Function Block Diagram | FBD | Process control, loops, analog calculations | | Structured Text | ST | Complex algorithms, data handling, math | | Sequential Function Chart | SFC | Batch, state-based, sequential processes |
Used primarily for older hardware and specific firmware revisions that support features like redundancy (supported in versions 8, 11, 13, 15, 16, 19, and 20). rslogix 5000