Moxa Technologies C168P user manual RS-485 Programming for Opt8J, Diagnose

Diagnose

The Diagnose, BIN\DIAGNOSE.EXE, is a utility that can help users to diagnose the hardware condition of each port of the selected board. See on-line help for more details.

Before executing it, please remove the Moxa driver in advance via executing “SER- DRV.EXE/Q” if the Moxa driver is running in the background.

RS-485 Programming for Opt8J

If you intend to do RS-485 communication with Opt8J, please follow the RS-485 programming guide below and also refer to Chapter “Connection Option (Opt8x) and Cable Wiring” for more Opt8J RS-485 operation details.

The Opt8J supports only 2-wire half-duplex RS-485 communication. Data+/- pins are served for both data transmitting and receiving, depending on the RTS signal.

The port switch of each port should be set to On position. The port is for transmitting data if RTS is asserted and for receiving data if RTS is not asserted.

RTS scheme is suitable for any system, including Windows NT and Windows 95/98, DOS, or UNIX, that permits RTS control from application programs.

4-8C168P User’s Manual