When all of your hyperterminal settings are correct, and you’re using the Oriental Motor communication cable, but you still can’t communicate through your PC’s COM port, you should check to ensure that your I/O has power. This is true for Alpha Step Plus Stepper Motor/Driver packages and the EMP_Series_programmable controller.
Do not use 5VDC and 24VDC at the same time on your power supply for your control signal pins.
