Design recovery for relay ladder logic
Design recovery for relay ladder logic
复制标题
继电器梯形逻辑的设计恢复
DOI：
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复制
发表时间：
1993
期刊：
影响因子：
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通讯作者：
B. Krogh
中科院分区：
文献类型：
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作者：
A. Falcione;B. Krogh
An algorithm for converting relay ladder logic (RLL) programs for programmable logic controllers (PLCs) into sequential function chart (SFC) programs is introduced. Since an SFC (a standardization of Grafcet) better represents the sequential flow of control logic, it is considerably easier to understand and modify SFC programs. The practical motivation for this study is to provide a tool for converting existing RLL programs into SFC programs by recovering the underlying sequential control logic. A basic design recovery algorithm is presented and applied to a simple RLL program for one stage of a batch chemical process. Several fundamental issues in discrete control logic representation and analysis are identified as fertile areas for future research.<<ETX>>
