Check if IO point has a good value

I have some inputs in a pointer table and do not know which specific IO units these inputs are connected to. I would like to know if I can rely on the points value or not.

Does anyone know a way to find out if the IO unit for the input in the pointer table is online? I don’t see anything in the command reference for this other than IsIoPointCommEnabled, and that only works if the point gets specifically disabled.