Create a 2‑wire RS‑485 connection from the display to WMT700.
- Connect the display COM1 or COM2 R− to WMT700 COM2 RS‑485− signals in pins 3 and 4.
- Connect the display COM1 or COM2 R+ to WMT700 COM2 RS‑485+ signals in pins 14 and 15.
- Make sure that the DIP switches in the display are set to RS‑485 (2‑wire) mode.
- Configure the COM port settings according to the wiring.