It is basically a way for the PLC to organise its data so that user PLC logic can quickly and efficiently access the data. In PLC5 and SLC500, data are stored/organised in what they call as Data File. For the rest of us, we can use this article as a Wiki/Dictionary for RSLogix500 SLC Status. Make sure you are online with the controller if you have that setup. It would be easier to follow if you have a RSLogix500 connected to a PLC. I am publishing this just as a reference for all.
I don’t take credit for all these documents as they are straight from the RSLogix500 Help File. This one is going to be a very detail look into the RSLogix500 SLC Status mainly highlighting what each of the register means and how to use it to debug your logic.
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