I checked my machine.dat file, the params you mentioned are correct, although mine had $DSECHANNEL[12]=0 but I figured that was no big problem as all the external axis were set to 0 anyways. the way they wired the servo gun to the robot was thorugh the RDC board at the base of the robot, but that should have been just for the external axis and not the brakes if I am correct. The x12 connector has 27 volts to it when the enabling switch is pressed on the pendant, and I am not seeing anything else out of the ordinary on on the KPS. With that said I will definatly do more digging and give you cable codes, like x16, which I removed. The breaker and fuses are fine, I continuty checked all fuses. Some more info that might help is: on the KPS led 3 and 4 are blinking really fast and led 5 only goes green for a second when the brake error comes up. Another thing is, when I press the enabling switch I here the drives click, when I go to jog the robot I here a high pitched sorrt of beep from the robot like the motors want to move but a second after that I recive the new STOP error on the pendant that won't let me jog anymore. I hope some new info helped!
Thanks!