A system is disclosed for automatic retrieval and analysis of PLC code including at least one code disassembler configured to receive, via one or more passive or active scanners connected to an automation network, compiled code configured for execution on one or more devices of the automation network, the at least one code disassembler automatically disassembling the compiled code into program code. The system including an analyzing component configured to receive the program code from the code disassembler and to automatically analyze the program code for errors. The system including an alerting component configured to receive one or more detected errors from the analyzing component and to communicate or store the one or more detected errors.

A power conversion system includes a power conversion apparatus and a programming support apparatus connected to the power conversion apparatus. The power conversion apparatus includes power conversion circuitry, program storage that stores a control program configured to control the power conversion circuitry, and a control unit that controls the power conversion circuitry according to a control program. The programming support apparatus includes a display data generation unit that generates display data of a block diagram illustrating a content of the control program using a plurality of functional blocks, and a link indicating input and output of information between the functional blocks based on the control program stored in the program storage.

A power conversion system includes a power conversion apparatus and a programming support apparatus connected to the power conversion apparatus. The power conversion apparatus includes power conversion circuitry, program storage that stores a control program configured to control the power conversion circuitry, and a control unit that controls the power conversion circuitry according to a control program. The programming support apparatus includes a display data generation unit that generates display data of a block diagram illustrating a content of the control program using a plurality of functional blocks, and a link indicating input and output of information between the functional blocks based on the control program stored in the program storage.