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What happens when “Step no. IN_∗” and “DRIVE” are simultaneously instructed during a positioning operation?: The controller determines the step numbers to operate by looking at the IN_∗ signal when DRIVE is turned ON.
If the DRIVE and IN_* signals are input at the same time, since the controller reads the step number from the IN_∗ signal before it has been fully input, the desired movement cannot be performed.
Be sure to set DRIVE to ON at least 15 ms after inputting the IN_∗ signal.