Header menu link for other important links
Understanding of logic in ladder program with its transformation into sequential graph using state space-based approach
Published in
Volume: 6
Issue: 2
Pages: 159 - 182
This paper presents an approach to understand the logic in ladder diagram (LD)/LD program by transforming it into a sequential function chart (SFC). Transformation of LD into SFC is done by employing state-space-based approach and rule-based heuristics. State space approach generates all possible states of the system, being controlled by LD, by assuming the occurrence of various events in the manufacturing system in an asynchronous manner. From all these states, practically feasible states that conform to heuristic rules developed for various control elements in the system are identified. From these feasible states, the sequence of occurrence of states, i.e., sequence graph is derived by a heuristic that relies on the essential input conditions activating each output in the LD. The effectiveness of the proposed approach is demonstrated with several case studies, representing increasing levels of logical complexity in the respective ladder diagrams. Copyright © 2013 Inderscience Enterprises Ltd.
About the journal
JournalInternational Journal of Mechatronics and Manufacturing Systems
Open AccessNo
Concepts (9)
  •  related image
    Design intent
  •  related image
  •  related image
    Reconfigurable manufacturing system
  •  related image
  •  related image
  •  related image
  •  related image
    Computer aided manufacturing
  •  related image
    Visual languages
  •  related image
    Ladder networks