4. Functions
44
SMC-4DL-PCI, SMC-8DL-PCI
Pulse output signal
Apart from the independent pulse (CW, CCW), this product can also generate the following pulses :
common pulse (pulse output, direction output), 90°-phase-different pulse (leading pulse output, trailing
pulse output). This allows you to use (or select) the most suitable one in accordance with the pulse motor
drive unit to be used (or connected). As these pulse outputs are line driver outputs, check the
specifications of the motor driver unit to be used before connecting them.
CAUTION
This product cannot directly drive the stepping motor. These pulse output signals must therefore be
connected to the motor driver unit prepared for the stepping motor.
CW (Positive-direction pulse output), CCW (Negative-direction pulse output)
CW (forward pulse output) is the pulse output signal to rotate (operate) the stepping motor clockwise
(CW). CCW (backward pulse output) rotates the motor counterclockwise. These signals are
independent of each other. When a command for rotation is executed, the pulse signal for the specified
direction outputs the preset number of operation pulses.
CW
CCW
When positive direction operates
When negative direction operates
Figure 4.4. Specification for Output Pulse in Independent Pulsing Method
OUT (Pulse output), DIR (Direction output)
OUT (pulse output) is the serial pulse output that carries the above CW and CCW signals on a single line.
The CW and CCW directions are indicated by the signal status of DIR (direction output). Note that the
DIR signal is valid only when the OUT signal is active.
OUT
DIR
When positive direction operates
When negative direction operates
Figure 4.5. Specification for Output Pulse in Common Pulsing Method
