1Introduction
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:
Remote control
※In below document, “PC” will represents all the control units that can sent or receive the RS232 protocol command.
2Description
2.1Hardware specification
LCD communication port in the rear side
(1)Connector type: DSUB 9 Pin Male
(2)Pin Assignment
| Pin # | Signal | Remark |
Male DSUB 9Pin | 1 | NC |
|
(outside view) | 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:
________________________________________________________________
V1.0 | 2 / 21 | Document |
