Galil DMC-1700, DMC-1800 user manual Inputs

Inputs
Encoder, A+, B+	Position feedback from incremental encoder with two channels in
	quadrature, CHA and CHB. The encoder may be analog or TTL. Any
	resolution encoder may be used as long as the maximum frequency
	does not exceed 12,000,000 quadrature states/sec. The controller
	performs quadrature decoding of the encoder signals resulting in a
	resolution of quadrature counts (4 x encoder cycles). Note: Encoders
	that produce outputs in the format of pulses and direction may also be
	used by inputting the pulses into CHA and direction into Channel B
	and using the CE command to configure this mode.
Encoder Index, I+	Once-Per-Revolution encoder pulse. Used in Homing sequence or Find
	Index command to define home on an encoder index.
Encoder, A-, B-, I-	Differential inputs from encoder. May be input along with CHA, CHB
	for noise immunity of encoder signals. The CHA- and CHB- inputs are
	optional.
Auxiliary Encoder, Aux A+,	Inputs for additional encoder. Used when an encoder on both the motor
Aux B+, Aux I+, Aux A-, Aux and the load is required. Not available on axes configured for step
B-, Aux I-	motors.
Abort	A low input stops commanded motion instantly without a controlled
	deceleration. Also aborts motion program.
Reset	A low input resets the state of the processor to its power-on condition.
	The previously saved state of the controller, along with parameter
	values, and saved sequences are restored.
Forward Limit Switch	When active, inhibits motion in forward direction. Also causes
	execution of limit switch subroutine, #LIMSWI. The polarity of the
	limit switch may be set with the CN command.
Reverse Limit Switch	When active, inhibits motion in reverse direction. Also causes
	execution of limit switch subroutine, #LIMSWI. The polarity of the
	limit switch may be set with the CN command.

Home Switch

Input 1 - Input 8 isolated Input 9 - Input 16 isolated Input 17 - Input 24 TTL

Latch

Input for Homing (HM) and Find Edge (FE) instructions. Upon BG following HM or FE, the motor accelerates to slew speed. A transition on this input will cause the motor to decelerate to a stop. The polarity of the Home Switch may be set with the CN command.

Uncommitted inputs. May be defined by the user to trigger events. Inputs are checked with the Conditional Jump instruction and After Input instruction or Input Interrupt. Input 1 is latch X, Input 2 is latch Y, Input 3 is latch Z and Input 4 is latch W if the high speed position latch function is enabled.

High speed position latch to capture axis position on occurrence of latch signal. AL command arms latch. Input 1 is latch X, Input 2 is latch Y, Input 3 is latch Z and Input 4 is latch W. Input 9 is latch E, input 10 is latch F, input 11 is latch G, input 12 is latch H.

DMC-1700/1800 Appendices • 205