A Programming Language for Discrete Event Production Systems Based on Production Flow Schema and Mark Flow Graph

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The authors propose a Mark Flow Graph (MFG) based programming language and programming procedure for control systems for practical discrete event production systems (DEPS).<br>Based on the hierarchical structure of the system, the programming procedure is a top-down approach from the conceptual level to the detail level of the DEPS. The macro representation of the system described through the production flow schema (PFS) is gradually broken down to generate the MFG which represents the system specifications in detail. The textual description (MFG/PFS language) is derived from this MFG/PFS model. In this language, DEPS activities are described through modules which are organized in a tree structure corresponding to the hierarchical structure of DEPS activities.<br>Programming tests using this language for MFG controllers and MFG simulators have confirmed the effectiveness and validity of this language for synthesis, updating and debugging of complex systems.

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