What are the 3 processor modes?

I have found that the Test Mode in Logix not only disables outputs, but when you switch from Test Mode to Run Mode the PLC application is fuly initialized, including system variables such as the very useful S:FS (or system first scan bit). Similar to what you can do with Codesys in the Online/Warm Reset function. Hope this is useful.

I must correct myself. Changing from Test Mode to Run Mode does not start the PLC application as I said in my previous post above.

I will see if there is another post that explains how to reset the PLC application from Logix Studio. My apologies.