The paper discusses the conversion of PLC (programmable logical controller) programs into forms suitable for their emulation by any software tool that includes some programming language capable of evaluating mathematical formulas, if-then instructions, and time tests, in the case of timers. The method offers advantage of low cost portability into a whole range of environments because it does not require the embodiment of large additional programming support for the simulation of various PLC instructions. The conversion, either of whole PLC program or its part, can also be utilized for auxiliary tests when a finished PLC program is transformed into a new hardware.
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