When the FX3U controls the stepper motor, the corresponding control direction of the Y0 is Y4. If the pulse value is positive, the stepper motor is positive, Y4=0, right? Does the stepper motor turn clockwise? (DRVI instruction)
When the pulse number is negative (-), the Y4 is broken to indicate reversal. The concept of counter clockwise and clockwise. Look at the electronic clock with a pointer in your home. You know what is clockwise and what is counter clockwise.
The direction of the motor by Y4 transform on and off the decision, while the Y4 is switched on and off by the pulse number issued by the PLC decision, the pulse number is (+) Y4 is said to (in fact, no matter how, as long as the control can reach the requirement of the equipments on the line).
Since you've used the DRVI command, the Y4 is the directional signal (which controls the direction of the stepper motor). When using the DRVI instruction to control the step motor
