Automatische Re-Implementierung von SPS-Programmen

Industrial tools offer only limited support for re-implementation of PLC programs onto new platforms. The generated code requires considerable manual re-work by a specialist. The re-implementation is especially complex for programs written in lowlevel languages such as Instruction List (IL) since the generated code lacks redocumentation. This paper proposes a re-implementation approach for IL programs based on Finite State Machines (FSMs) as an intermediate model. The FSMs serve as re-documentation of the code using XML-related technologies for visualizations. The sequence control parts of the program are in a further step automatically converted into Sequential Function Charts compliant to IEC 61131-3.