NI SMD-7611/7612 User Manual
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© National Instruments
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19
Figure 22.
Delay Due to Filtering
Step 6: Step Pulse Type
Most indexers and motion controllers provide motion commands in the Step and Direction
format. The Step signal pulses once for each motor step and the direction signal commands
direction. Some PLCs may use a different type of command signal: one signal pulses once for
each desired step in the clockwise direction (STEP CW), while a second signal pulses for
counterclockwise motion (STEP CCW). The SMD-7611/7612 drives can accept this type of
signal if you remove the drive cover and move jumper S3 from the default position on pins 1 and
2 to the 1-3 position. In STEP CW/STEP CCW mode, the CW signal should be connected to the
STEP input and the CCW signal to the DIR input.
Figure 23 shows the jumper positions.
Figure 23.
Step Pulse Type Jumper Positions