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5-6 Operation
MN1940
5.2.2.2 I/O settings view
The I/O settings view shows two additional parameters for the DSM:
Clock Type
The Clock Type parameter configures the step and direction inputs for the type of input signals
being supplied to the motor.
H
Step/Dir is the default setting. A waveform supplied to the step
input causes the motor to advance one step for each rising
edge. The direction input is held either high or low to determine
the direction of motion.
H
Quadrature requires a pair of waveforms, such as those
typically produced by an incremental encoder. The two
waveforms are at the same frequency but approximately 90° out
of phase (i.e. ‘in quadrature’). One is supplied to the step input,
the other to the direction input. Each edge causes the motor to
advance one step, with the direction being determined by the
relative timing of the waveforms. For example, if the rising edge on the step input waveform
is received before the rising edge on the direction input waveform, the motor will turn in one
direction. If the rising edge on the direction input is received first, the motor will turn in the
opposite direction.
H
Up / Down requires a waveform to be supplied to either the step
input or the direction input. If the waveform is supplied to the
step input, the motor will turn in one direction. If the waveform
is supplied to the direction input, the motor will turn in the
opposite direction.
Clock IOF
The Clock IOF parameter sets the frequency of the clock input filter. Values in the range 50 ns
to 12.9
μ
s (10 MHz to 38.8 kHz) are available.
Step
Dir
Step
(CHA)
Dir
(CHB)
Step
Dir