ViewSonic VTMS2431 User Guide - Page 50

RS232 Protocol

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Other Information RS232 Protocol 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: • Set-Function • Get-Function • Remote control pass-through mode ※In below document, "PC" will represents all the control units that can sent or receive the RS232 protocol command. ENGLISH 2. Description 2.1 Hardware specification Viewsonic LCD communication port in the rear side (1) Connector type: DSUB 9 Pin Male (2) Pin Assignment Male DSUB 9Pin (outside view) 12 345 6789 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. 2.2 Communication Setting • Baud Rate Select: 9600bps (fixed) • Data bits: 8bits (fixed) • Parity: None (fixed) • Stop Bits: 1 (fixed) 2.3 Command 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 "-" (02Dh) followed by "CR" (00Dh) Contact ViewSonic service team at: http://www.ViewSonic.com or call our service team: United States 1-800-688-6688, Canada 1-866-463-4775 ViewSonic 45 VTMS2431

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ENGLISH
Contact ViewSonic service team at: http://www.ViewSonic.com or call our service team: United States 1-800-688-6688, Canada 1-866-463-4775
ViewSonic
VTMS2431
Other Information
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:
• Set-Function
• Get-Function
• Remote control pass-through mode
※
In below document, “PC” will represents all the control units that can sent or receive the
RS232 protocol command.
2. Description
2.1 Hardware specification
Viewsonic LCD communication port in the rear side
(1) Connector type: DSUB 9 Pin Male
(2) Pin Assignment
Male DSUB 9Pin
(outside view)
12
345
6
7
8
9
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.
2.2 Communication Setting
• Baud Rate Select: 9600bps (fixed)
• Data bits: 8bits (fixed)
• Parity: None (fixed)
• Stop Bits: 1 (fixed)
2.3 Command 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
“-” (02Dh) followed by “CR” (00Dh)
RS232 Protocol