1 Introduction
This document describes the hardware interface spec and software protocols of RS232 interface communication between Viewsonic Commercial Display and PC or other control unit with RS232 protocol. The protocol divide into three sections:
z
z
zRemote control
※In below document, “PC” will represents all the control units that can sent or receive the RS232 protocol command.
2 Description
2.1Hardware specification
Viewsonic LCD communication port in the rear side
(1)Connector type: DSUB 9 Pin Male
(2)Pin Assignment
Male DSUB 9Pin
(outside view)
Pin # | Signal | Remark |
1 | NC |
|
2 | RXD | Input to LCD Monitor |
3 | TXD | Output from LCD Monitor |
4 | NC |
|
5 | GND |
|
6 | NC |
|
7 | NC |
|
8 | NC |
|
9 | NC |
|
frame | GND |
|
*Use of crossover (null modem) cable required for use with PC
2.2Communication Setting
- Baud Rate Select: | 9600bps (fixed) |
- Data bits: | 8bits (fixed) |
- Parity: | None (fixed) |
- Stop Bits: | 1(fixed) |
2.3Command Message Reference
PC sends to Monitor command packet followed by “CR”. Every time PC sends control command to the Monitor, the Monitor shall response as follows:
1.If the message is receives correctly it will send “+” (02Bh) followed by “CR” (00Dh)
2.If the message is receives incorrectly it will send
3 Set-Function Listing
The PC can control the LCD Monitor for specific actions. The
ViewSonic | CD3200 | ii |