I am trying to map an I/O tag to an Emerson FB107 but can not figure out the address assist Logical Number. It does not seem to match up with the TLP number.

I'm not familiar with the ROC address assist so I can't point you directly towards a solution. I can, however, suggest you try the below link to the VTScada help files on this topic (Press F1 with the ROC address assist window open to get to the same place in VTScada):
https://www.vtscada.com/help/Content/D_Tags/D_ROC_Addressing.htm

The Logical number is the “L” in the TLP, i.e. the middle number in a ROC address. So if the TLP is 43:1:10 then the logical number is 10.

Also note - until the Logical Number edit field loses focus (e.g. you press enter or you click somewhere else) the next droplist won’t appear. Maybe that’s what their issue is?

Dougs / Dave - VT SCADA. Thank you. I was overthinking it and trying to enter the entire TLP under the logical number.