The CN1 connectors have these signals:
PRDY: CNC sends contact closure between CN1 pin 1 and CN1 pin 14
ENBL: CNC sends contact closure between CN1 pin 2 and CN1 pin 15
OVL: Servo sends contact closure betwen CN1 pin 3 and CN1 pin 16
VRDY: Servo sends contact closure between CN1 pin 4 and CN1 pin 17
Tach signal - analog input to servo between CN1 pin 6 and CN1 pin 19
VCMD signal - analog input to servo between CN1 pin 7 and CN1 pin 20
All other pins are unused.
The contact closure OVL from the servo to the CNC is from the motor overload sensor (the current sensor on the motor armature current that has the little red reset button).
The contact closure VRDY is from a small set of contacts on the side of the big MCC contactor. |