I want to run 10 digital inputs & 12 Digital outputs and 6 analog inputs and 2 analog outputs for AC Tech's SMVector drive http://www.actechdrives.com/Lenze-SMVector-IP31.htm . Now, in a prefect world, I would be able to use Ethernet and MODBUS so I can communicate with a Red Lion touch screen devic...

Can't you use a ready-made counter? I have used Panasonic, IDEC & Kubler brands before and have been very happy with their performance.

Here's a link to Kubler pulse counters.

http://www.clrwtr.com/Kubler-Pulse-Counters.htm

Why do you want to use an obsolete controller? GE controllers were manufactured by FUJI for the longest time. But when Fuji decided to come to the US on their own they terminated their relationship with GE. FUJI stopped making controllers for GE in the early 2000s. Take a look at AC Tech's SMV serie...