Brushing off the problem as somebody else's issue when this is my first experience with PMDX hardware and support isn't exactly comforting...
And that is not a great way to get people to want to help you out :(
I expect more from a company I spend my money with. This is all I will say about it since I'm here to fix a problem, not start a dialogue on customer service.
Regardless of that, thank you for jumping in. The plugins are activated in Mach4 the same way they are in my other machines. The lights on the pendants power up when they are plugging in prior to starting mach4 up. All drivers are registered within Windows. Mach4 does not recognize any inputs from the pendant, either in the DRO's or in the history bar. There is no indication from Mach that the pendant is installed and plugged in. This is the first time I've experienced this problem, and I've been using Mach4 for a couple years now, and VistaCNC pendants since they started selling them. As previously stated, I've had no issues with ESS-based and Vital Systems based systems, both of which just start moving when the pendant is activated. I did notice in Mach4 under PMDX control that the inputs, outputs, and mpg tabs have the pendant as an option in the configuration drop downs, this is why I thought maybe there were some settings within Mach that the PMDX motion control requires to recognize the pendant. These drop downs do not contain any reference to the pendant in my other Mach4 systems.
I guess if PMDX doesn't actually work with VistaCNC pendants, that what other options are there? I see an encoder input into the 424 board but I'm not interested at all in creating my own scabbed together pendant or splicing something else in.
Thanks for any help toward the resolution of this issue.