[marsheng]

I presume you have the parameters in a file.

From memory, I had to enter P0900 and P0901 parameters manually and then I could load via the serial port. (Special Parameters go from 0900 to 0932)

My machine settings was 4800 E 7 bits 2 stop bits.

It appeared to me that loading parameters worked fine with 3 wire but programs needed 5. I could be wrong.

I used Realterm for communications. It tells you what the machine replies. Need to set as shown

Attachment 491898
Attachment 491900.

[zavateandu]

you can also load programs with 3 wires
the 5 wires setup is need it when you drip feed direct from PC a.k.a. DNC mode