1. Requirements for Diagnostics In order to monitor and troubleshoot the control system with STEP 7, the project file downloaded to the CPU must be identical to the project file in the computer. If the downloaded project is not encrypted, you can use STEP 7 to upload the user program and configuration information from the CPU. 9H Flexible Glass Screen Protector
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2. Diagnosing faults with the quick view Select the plc site to be checked in the SIMATIC Manager, execute the menu command "PLC" → "Diagnostics / Settings" → "Hardware Diagnostics", open the quick view and you will see the CPU of the station, the faulty module And DP slaves. Select a DP slave and click the “Module Information†button to view its fault information.
3. Diagnosing faults with the diagnostic buffer of the CPU Select the CPU in the quick view and click on the "Module Information" button to open the module information dialog of the CPU. You can see various diagnostic events in the "Diagnostics Buffer" tab of the Module Information dialog box. Select an event and the "Details on Events" window below the diagnostic buffer will display the details of the event. Click the "Event Help" button to get help information.
Detailed and accurate information about the fault can be obtained from the diagnostic buffer. This includes the network number of the faulty DP slave and the number of the DP slave, the number of the OB that is called to handle the fault, the cause of the CPU shutdown, the starting address of the faulty module, and what kind of fault. It is an incoming event (a fault occurs) or an outgoing event (a fault disappears). The small image below is the lower part of the details.
You can also open the module information dialog of the CPU by executing the menu command "PLC" → "Diagnostics / Settings" → "Module information" in the SIMATIC Manager.
4. Diagnostics with the diagnostics view The diagnostic view is actually the online hardware configuration view. Click on the "Open online site" button in the quick view to open the diagnostics view and you can see faulty DP slaves and faulty modules in the slaves. Double-click the faulty module to open its "Module Information" dialog box, you can see the specific fault information of the module.
