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Document 020-1156-00 Rev B
1 Introduction
This document describes the hardware interface spec and software protocols of RS232 interface
communication between Commercial Display and PC or other control unit with RS232 protocol.
1. Protocol 1, with ID
This set protocol allow user to assign the ID in the command to control the specify ID monitor
2. Protocol 2, without ID
The set protocol is best for single display control
Both sets protocol contain three sections command:
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
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
2.2 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: