Nuvo-2400
User’s Manual
Copyright © 2015 Neousys Technology Inc. All Right Reserved.
Page 56 of 81
5.1.1 COM1 & COM2 Operation Mode
COM1 and COM2 of
Nuvo-2400
support RS-232 (full-duplex), RS-422 (full-duplex) and
RS-485 (half-duplex) mode. You can set the operating mode via BIOS settings. Another
option in BIOS called
[Slew Rate]
defines how sharp the rising/falling edge is for the output
signal of COM1 and COM2. For long-distance RS-422/485 transmission, you may set the
[Slew Rate]
option as
[High]
to improve signal quality. For RS-422/485 communication, the
[RS-422/485 Termination]
option determines whether to enable/disable internal
termination of RS-422/485 transceiver according to your wiring configuration (e.g. with or
without external termination).
To set COM1 and COM2 operating mode:
1. When
Nuvo-2400
boots up, press F2 to enter BIOS setup utility.
2. Go to
[Advanced] / [Peripheral Configuration]
3. Set the
[Set COM1 as]
option to a proper mode for COM1 of your
Nuvo-2400
.
Figure 50: Setting Modes of COM Port in BIOS
