ADLINK Technology PCI-8132, Руководство пользователя

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Operation Theorem
4.1.1 Pulse Command Output
The PCI-8132 uses pulse command to control the servo / stepper motors
via the drivers. The pulse command consists of two signals: OUT and
DIR. There are two command types: (1) single pulse output mode
(OUT/DIR); and (2) dual pulse output mode (CW/CCW type pulse output).
The software function: set_pls_outmode() is used to program the pulse
command type. The modes vs. signal type of OUT and DIR pins are as
following table:
Mode Output of OUT pin Output of DIR pin
Dual pulse output
Pulse signal in plus (or
CW) direction
Pulse signal in minus (or
CCW) direction
Single pulse output Pulse signal Direction signal (level)
The interface characteristics of these signals could be differential line
driver or open collector output. Please refer to section 3.1 for the jumper
setting of signal types.
♦
Single Pulse Output Mode(OUT/DIR Mode)
In this mode, the OUT signal is represent the pulse (position or velocity)
command. The numbers of OUT pulse represent the motion command
for relative “distance” or “position”, the frequency of the OUT pulse
represents the command for “speed” or “velocity”. The DIR signal
represents direction command of the positive (+) or negative (-). This
mode is the most common used mode. The following diagram shows the
output waveform.
♦
Dual Pulse Output Mode(CW/CCW Mode)
In this mode, the waveform of the OUT and DIR pins represents CW
(clockwise) and CCW (counter clockwise) pulse output respectively.
Pulses output from CW pin makes motor move in positive direction,
whereas pulse output from CCW pin makes motor move in negative
direction. The following diagram shows the output waveform of positive
(plus,+) command and negative (minus,-) command.
OUT
DIR
Positive Command Negative Command