Sorry. My subject is misleading.
I'm using the STYLE option for program select, not PNS.
I managed to get it sorted out this morning after reading the replies and going through everything again.
I was confused about the procedure to call a program using the STYLE option and got mixed up with the PNS procedure.
Basically everything was setup for STYLE with my Programs assigned to the STYLE table as well, but I was trying to use the PNS Strobe input to call the program selected by the STYLE1-8 inputs.
Also, I forgot to mention that our PLC is connected via Ethernet/IP, so there are no hard-wired control signals to check.
I was monitoring the I/O on the pendant and was seeing everything correctly there, which is what left me confused about what I was doing wrong.
Basically I just needed to trigger the DI[126] UOP UI START input rather than the DI[137] PNS STROBE input once my STYLE 1-8 inputs were set.
Thanks.