: Ensure the rotary switch on the PLC is set to COM2 for standard PC communication.
If you are using this software to communicate with a PLC, standard serial cables often fail. You must use a with a specific pinout: PC (Female DB9) PLC (Male DB9) TX/RX RX/TX GND Baud Rate : 9600 Hitachi ActWin All.rar
: Often includes version 3.16 (DOS-based core) or newer versions like 3.51A ( Scribd ). : Ensure the rotary switch on the PLC