Signal Descriptions
Inputs
Encoder, MA+, MB+ 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 15,000,000 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, MI+ Once-Per-Revolution encoder pulse. Used in Homing sequence or Find
Index command to define home on an encoder index.
Encoder, MA-, MB-, MI- 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, AA+, AB+, Aux
A-, Aux B-
Inputs for additional encoder. Used when an encoder on both the motor
and the load is required. Not available on axes configured for step
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.
Electronic Lock Out Input that when triggered will shut down the amplifiers at a hardware
level. Useful for safety applications where amplifiers must be shut down
at a hardware level.
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 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.
Input 1 - Input 8 isolated
Input 9 - Input 16 isolated
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.
Latch High speed position latch to capture axis position on occurrence of latch
signal. AL command arms latch. Input 1 is latch A, Input 2 is latch B, Input
3 is latch C and Input 4 is latch D. Input 9 is latch E, input 10 is latch F,
input 11 is latch G, input 12 is latch H.
Appendices ▫ 179 DMC-41x3 User Manual
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