Siemens S7-300PLC hardware diagnostics how to operate - Database & Sql Blog Articles

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Q: I have a problem with Siemens S7-300plc, please help me explain the steps of hardware troubleshooting.

A: "The CPU diagnostic buffer can be used for detailed fault diagnosis as follows: First establish the bus connection between the computer and the PLC, select the station to be checked in the SIMATIC Manager (eg SIMATIC-300(1)), execute the menu PLC/ Diagnosis/Setting/ModuleInformation, in the “DiagnosticBuffer” option of the module information window, gives a list of events that occur in the CPU. Select “Events”. In a row, the gray "Details on Events" window will display a detailed description of the event. You can select "SaveAs" in the lower left corner to save the fault information to a directory on your computer's hard drive, then open This file will see the diagnostic information for each event, which is helpful for judging the fault."