TechTalk - RSLogix 5 : Debug Faulted PLC

TechTalk - RSLogix 5 : Debug Faulted PLC

Xybernetics RSLogix 5 : Debug Faulted PLC

If you PLC is faulted, how can you rectify it.

Xybernetics RSLogix 5 : Debug Faulted PLC

Click on the pull-down menu.

Xybernetics RSLogix 5 : Debug Faulted PLC

Alternatively, you can double click on the Processor Status. Then click on the “Errors” tab.

Xybernetics RSLogix 5 : Debug Faulted PLC

Either way it should popup, the window shown below.

Xybernetics RSLogix 5 : Debug Faulted PLC

This error is point to my PID which is having issue. That is where I will start my debugging.

Once you are done debugging your error, click on the “Clear Major Error” button (on the same popup window). If the error does not clear, the error still persist on your logic.

you will also notice that the PLC status will be cyan (as shown below). Which denotes that the PLC logic is not running.

Xybernetics RSLogix 5 : Debug Faulted PLC

Once you managed to clear the error (logic debugged and click the “Clear Major Error”), you can start running the PLC logic as shown below. Note that you cannot change the mode to run until the debug is fixed… no short cuts.

Xybernetics RSLogix 5 : Debug Faulted PLC

Once I fixed my PID error, when I open the Process Status window (Error tab), this is what I get. There is no more errors now. You can click the “Clear Major Error” button if you like to ensure that all the errors care cleared.

Xybernetics RSLogix 5 : Debug Faulted PLC

Try running the PLC logic again. See screenshot below.

Xybernetics RSLogix 5 : Debug Faulted PLC

And if all the errors are truly cleared, you should get your PLC online again.

Xybernetics RSLogix 5 : Debug Faulted PLC

A lot of thing can cause the PLC to fault. Inspecting each of the fault is not part of this article.
I hope this will give you starting point on debugging your faulted PLC.

Leave a reply

Your email address will not be published. Required fields are marked *