Object-Oriented Modeling, Simulation and Automatic Generation of PLC Ladder Logic
Kwan Hee · InTech eBooks · 2010
Currently, most enterprises do not adopt systematic development methodologies for ladder logic programming. As a result, ladder programs are error-prone and require timeconsuming tasks to debug logic errors. In order to improve current PLC programming practices, this chapter proposes an integrated object-oriented ladder logic development framework in which control logic is designed, validated, generated automatically, and finally verified. Proposed framework consists of three phases: First is the design phase. Second is the simulation phase. Third is the generation and verification phase. During the phase I, objectoriented design model is built, which consists of three sub-models: functional sub-model, structure sub-model and interaction sub-model. Based on the design result, O-O simulation model is constructed and executed for validating control logic during Phase II. After