ViewSonic CDE6520-W User Guide - Page 42

RS232 Protocol

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11. RS232 Protocol 11.1. Introduction This document describes the hardware interface spec and software protocols of RS232 interface communication between ViewSonic Commercial TV / Digital Signage and PC or other control unit with RS232 protocol. The protocol contains three sections command: • Set-Function • Get-Function • Remote control pass-through mode * In the document below, "PC" represents all the control units that can send or receive the RS232 protocol command. 11.2. Description 11.2.1. Hardware specification Viewsonic TV communication port on the rear side: (1) Connector type: DSUB 9-Pin Male (2) Pin Assignment Male DSUB 9-Pin (outside view) [Special case] 2.5mm barrel connector Pin # 1 Signal NC Remark 2 RXD Input to Commercial TV or DS 3 TXD Output from Commercial TV or DS 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 Pin # Tip Signal TXD Remark Output from Commercial TV or DS Ring Sleeve RXD GND Input to Commercial TV or DS 11.2.2. Communication Setting - Baud Rate Select: - Data bits: - Parity: - Stop Bits: 9600bps (fixed) 8 bits (fixed) None (fixed) 1 (fixed) 11.2.3. Command Message Reference PC sends to Monitor command packet followed by "CR". Every time PC sends control command to the Monitor, the Monitor shall respond as follows: 1. If the message is received correctly it will send "+" (02Bh) followed by "CR" (00Dh) 2. If the message is received incorrectly it will send "-" (02Dh) followed by "CR" (00Dh) 34

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34
11.
RS232 Protocol
11.1. Introduction
This document describes the hardware interface spec and software protocols of RS232 interface
communication between ViewSonic Commercial TV / Digital Signage and PC or other control unit with
RS232 protocol.
The protocol contains three sections command:
• Set-Function
• Get-Function
•
Remote control pass-through mode
* In the document below, “PC” represents all the control units that can send or receive the RS232 protocol
command.
11.2. Description
11.2.1. Hardware specification
Viewsonic TV communication port on the rear side:
(1) Connector type: DSUB 9-Pin Male
(2) Pin Assignment
Male DSUB 9-Pin
(outside view)
Pin #
Signal
Remark
1
NC
2
RXD
Input to Commercial TV or DS
3
TXD
Output from Commercial TV or DS
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
[Special case] 2.5mm barrel
connector
Pin #
Signal
Remark
Tip
TXD
Output from Commercial TV or DS
Ring
RXD
Input to Commercial TV or DS
Sleeve
GND
11.2.2. Communication Setting
- Baud Rate Select:
9600bps (fixed)
- Data bits:
8 bits (fixed)
- Parity:
None (fixed)
- Stop Bits:
1 (fixed)
11.2.3. Command Message Reference
PC sends to Monitor command packet followed by “CR”. Every time PC sends control command to the
Monitor, the Monitor shall respond as follows:
1. If the message is received correctly it will send “+” (02Bh) followed by “CR” (00Dh)
2. If the message is received incorrectly it will send “-” (02Dh) followed by “CR” (00Dh)