Spindle speed?

I believe I got them and then some. 

OK so fairly complex...

As I said before, maybe the first step is to take a look at
hm2_5i24.0.7i83.0.2.analogout0 in halshow when running
the spindle in each direction.

Thank you for letting me know about halshow. There is a wealth of data in here that will be VERY helpful. Unfortunately, the image size exceeds allowable data limit so I can't attach them just yet. Looking into reducing the file size. 

This should work.

Digging into a bit deeper, whenever I run it in reverse the setting jumps to 8.25 and stays there. If I run it forward it stays around 2.69 with some variation in the next 5 digits. It moves up and down with speed adjustment. 

I'm beginning to wonder if it's getting speed signal or worse this encoder can't read in reverse. If it doesn't get speed feed back, it has nothing to hold it to so it just defaults to a set number. At least this is my reasoning thus far.

I was wrong!. It can read rpm in both forward and reverse after watching spindle-vel-fb-rpm in halshow.

Sorry, I guess the images didn't upload. "hm2_5i24.0.7i83.0.2.analogout0 <= spindle-speed-DAC" reads in forward and reverse. In reverse it shows a reading of 8.25 and stays there, doesn't move when trying to adjust the speed.. In forward it stays around 2.69 with some variation in the next 5 digits. It moves up and down with speed adjustment.

Its a bit tricky to setup a PID speed control with a unipolar analog control
and FWD/REV signals.

I would first try eliminating the feedback by running the spindle open loop
you can do this by setting all PID terms to 0 except FF0 which should be  set to 1.0

If you need feedback (this is rare unless the spindle speed control is very poor)
The structure needs to be like this:

PID command = signed commanded spindle speed in RPM
PID feedback = encoder RPM
PID output --> ABS --> analog out
ABS sign (of PID output) determines the FWD/REV pins

I'm going to go ahead and try this. I'll let you know what it does.
The one thing I'm having a hard time wrapping my head around is even with analog control, I have speed control forward. The GUI bar turns green and moves goes up and down with the override buttons, just not in reverse. In reverse goes to a set number, a number I cannot find and stays put regardless of what's pressed. However, if I reverse the forward and reverse signals to the VFD I have the same forward control as before, now in reverse. I don't see why the same forward and reverse control shouldn't be possible,

If it's necessary to convert this to PWM to gain the same forward control as reverse, so be it, this Mitsubishi VFD is capable.
I'll cross that bridge when I reach it.
I need to gain a better understanding of Linuxcnc spindle control.
I appreciate your help.