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204 • Appendices DMC-1700/1800
PWM/STEP OUT For stepper motors: The STEP OUT pin produces a series of
p
ulses for
input to a step motor driver. The pulses may either be low or high.
The pulse width is 50%. Upon Reset, the output will be low if the SM
j
umper is on. If the SM jumper is not on, the output will be Tri-state.
Sign/Direction Used with PWM signal to give the sign of the motor command for
servo amplifiers or direction for step motors.
Error The signal goes low when the position error on any axis exceeds the
value specified by the error limit command, ER.
Output 1-Output 8
Output 9-Output 16
(DMC-1750 thru 1780
These 8 TTL outputs are uncommitted and may be designated by the
user to toggle relays and trigger external events. The output lines are
toggled by Set Bit, SB, and Clear Bit, CB, instructions. The OP
instruction is used to define the state of all the bits of the Output port.