【提问】：How to set
【详情】：I will contact you from Korea. I purchased the HF2211 model. I'm setting up while looking at the manual. The purpose is for RS-232C connection. PC <-> HF2211 <-> PLC COM3 is in Windows Device Manager. If you select COM3 as PLC connection option and press Connect, it will fail continuously. If possible, please explain in detail in the video.