ViewSonic CD4233 Bedienungsanleitung

Commercial Display RS-232 Protocol

Revision 1.x

________________________________________________________________

May 28, 2007 1 / 16 Commercial Display RS-232 Protocol

CD5233/CD4233 RS232 protocol

Table of content

1 Introduction................................................................................................................. 1

2 Description.................................................................................................................. 2

2.1 Hardware specification ....................................................................................... 2

2.2 Communication Setting ...................................................................................... 2

2.3 Command Message Reference............................................................................ 2

3 Protocol 1 : with ID..................................................................................................... 2

3.1 Command Description........................................................................................ 2

3.2 Set-Function Listing............................................................................................ 3

3.3 Get-Function Listing........................................................................................... 7

4 Protocol 2 : without ID ............................................................................................. 10

4.1 Set function listing............................................................................................ 10

4.2 Get-Function Listing......................................................................................... 12

4.3 Remote Control Pass-through mode................................................................. 15

Version control

Date

Reversion

Changes and additions

05/03/2010

V1.0

First release, combine two protocol sets in one

document

Tony Kao

Applicable model

CD5233

CD4233

1Introduction

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.

Viewsonic CD5233 and CD4233 contain with 2 set of protocol command

1. Protocol 1, with ID

Commercial Display RS-232 Protocol

Revision 1.x

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May 28, 2007 2 / 16 Commercial Display RS-232 Protocol

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 and for Viewsonic NMP-530.

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.

2Description

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)

Pin #

Signal

Remark

RXD

Input to LCD Monitor

TXD

Output from LCD Monitor

GND

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)

3Protocol 1 : with ID

3.1

Command Description

Length:

Total Byte of Message excluding “CR”

Commercial Display RS-232 Protocol

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TV ID

Identification for each of TV

Command

Type

Identify command type,

“s”(0x73h) : Set Command

“g”(0x67h) : Get Command

“r”(0x72h) : Reply Command

“p”(0x70h) : RCU Pass-through

“+”(0x2Bh) : Valid command Reply

“-“(0x2Dh) : Invalid command Reply

Command:

Function command code: One byte ASCII code

Value[1~3]:

Three bytes ASCII that defines the value

0x0D

3.2

Set-Function Listing

The PC can control the LCD Monitor for specific actions. The Set-Function command allows you to

control the LCD monitor behavior in a remote sit through the RS232 port. The Set-Function packet

format consists of 11 bytes.

Set-Function description:

Length:

Total Byte of Message excluding “CR”

TV ID

Identification for each of TV

If we want to set all TV settings, TV ID can use “99”to achieve, and

it will not have Reply command on this function.

Command

Type

Identify command type,

“s”(0x73h) : Set Command

Command:

Function command code: One byte ASCII code

Value[1~3]:

Three bytes ASCII that defines the value

0x0D

Set-Function format

Send: (Command Type=”s”)

Name

Length

Command

Type

Command

Value1

Value2

Value3

Byte

Count

1 Byte

2 Byte

1 Byte

Bytes

order

2~3

Reply: (Command Type=”+”or “-”)

Name

Length

Command

Type

Byte

Count

1 Byte

2 Byte

1 Byte

Bytes

order

2~3

Example1: Set Brightness as 76 for TV-02 and this command is valid

Send (Hex Format)

Name

Length

Command

Type

Command

Value1

Value2

Value3

Hex

0x38

0x30

0x32

0x73

0x24

0x30

0x37

0x36

0x0D

Commercial Display RS-232 Protocol

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May 28, 2007 4 / 16 Commercial Display RS-232 Protocol

Reply (Hex Format)

Name

Length

Command

Type

Hex

0x34

0x30

0x32

0x2B

0x0D

Example2: Set Brightness as 176 for TV-02 and this command is NOT valid

Send (Hex Format)

Name

Length

Command

Type

Command

Value1

Value2

Value3

Hex

0x38

0x30

0x32

0x73

0x24

0x31

0x37

0x36

0x0D

Reply (Hex Format)

Name

Length

Command

Type

Hex

0x34

0x30

0x32

0x2D

0x0D

Example3: Set Tint as 32 for TV-03 and this command is valid

Send (Hex Format)

Name

Length

Command

Type

Command

Value1

Value2

Value3

Hex

0x38

0x30

0x33

0x73

0x27

0x30

0x33

0x32

0x0D

Reply (Hex Format)

Name

Length

Command

Type

Hex

0x34

0x30

0x33

0x2B

0x0D

Example4: Set Tint as 75 for TV-03 and this command is NOT valid

Send (Hex Format)

Name

Length

Command

Type

Command

Value1

Value2

Value3

Hex

0x38

0x30

0x33

0x73

0x27

0x30

0x37

0x35

0x0D

Reply (Hex Format)

Name

Length

Command

Type

Hex

0x34

0x30

0x33

0x2B

0x0D

Example5: Set Brightness as 76 for all TV and this command is valid

Send (Hex Format)

Name

Length

Command

Type

Command

Value1

Value2

Value3

Hex

0x38

0x39

0x73

0x24

0x30

0x37

0x36

0x0D

No Reply.

CD5233/CD4233 set-function table

Set Function

Length

Command

Value Range

Comments

Type

Code (ASCII)

Code (Hex)

(Three ASCII bytes)

Power

000: STBY

Controlled power

Commercial Display RS-232 Protocol

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May 28, 2007 5 / 16 Commercial Display RS-232 Protocol

001: ON

status: ON or

Standby

Input Select

“

000 : VGA

001 : HDMI

002 : DVI-D

003 : AV

004 : YPbPr

005 : S-Video

Contrast

000 ~ 100

Brightness

000 ~ 100

Sharpness

000 ~ 100

Color

000 ~ 100

Tint

„

000 ~ 100

Bass

000 ~ 100

Sets Bass value

Treble

000 ~ 100

Sets Treble value

Balance

000 ~ 100

Sets Balance

position

Picture Size

000 : FULL

001 : NORMAL

002 : CUSTOM

003 : DYNAMIC

004 : REAL

OSD Language

000 : English

001 : French

002 : Spanish

003 : Germany

004 : Italian

005 : Simplified

Chinese

006 : Russian

007 : Polish

008 : Turkish

OSD timeout

005 ~120 Sec

Set OSD timeout

Volume

000 ~ 100

Mute

000: OFF

001: ON (mute)

Off Timer

000: OFF

001~024 (hour)

PIP Mode

000 : OFF

001: PIP

002: POP

003 : PBP

004 : PBPA

PIP Sound select

000: Main

001: PIP

PIP position

;

000: Up

001: Down

002: Left

003: Right

PIP Input

000 : VGA

001 : HDMI

002 : DVI-D

003 : AV

004 : YPbPr

Commercial Display RS-232 Protocol

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May 28, 2007 6 / 16 Commercial Display RS-232 Protocol

005 : S-Video

Monitor ID

001 ~ 026

Key Pad

000 : POWER

001 : SOURCE

002 : MENU/EXIT

003 : UP

004 : DOWN

005 : LEFT

006 : RIGHT

007 : MUTE

Remote Control

000: Disable

Disable: RCU has

no effect on HDTV.

001: Enable

Enabled: RCU

controls the HDTV.

This is the power up

default on the

HDTV.

002: Pass through

Pass through: RCU

has no effect on

HDTV and all RCU

command codes are

transmitted to FC

via the RS232 port.

See page 26 for

more details

Key Pad

000: Disable

Disable: Key Pad

have no effect on

HDTV.

001: Enable

Enabled: Key Pad

control the HDTV.

This is the power up

default on the

HDTV.

Factory reset

Rests HDTV to

factory setting

Commercial Display RS-232 Protocol

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May 28, 2007 7 / 16 Commercial Display RS-232 Protocol

3.3

Get-Function Listing

The PC can interrogate the LCD Monitor for specific information. The Get-Function packet format

consists of 5 bytes which is similar to the Set-Function packet structure. Note that the “Value” byte

is always = 00.

Get-Function description:

Length:

Total Byte of Message excluding “CR”

TV ID

Identification for each of TV

Command

Type

Identify command type,

“g”(0x67h) : Get Command

Command:

Function command code: One byte ASCII code

Value[1~3]:

Three bytes ASCII that defines the value

0x0D

Get-Function format

Send: (Command Type=”g”)

Name

Length

Command

Type

Command

Value1

Value2

Value3

Byte

Count

1 Byte

2 Byte

1 Byte

Bytes

order

2~3

Reply: (Command Type=”r”or “-”)

If the Command is valid, Command Type =”r”

Name

Length

Command

Type

Command

Value1

Value2

Value3

Byte

Count

1 Byte

2 Byte

1 Byte

Bytes

order

2~3

If the Command is Not valid, Command Type=”-“

Name

Length

Command

Type

Byte

Count

1 Byte

2 Byte

1 Byte

Bytes

order

2~3

Example1: Get Brightness from TV-05 and this command is valid.

The Brightness value is 67.

Send (Hex Format)

Name

Length

Command

Type

Command

Value1

Value2

Value3

Hex

0x38

0x30

0x35

0x67

0x62

0x30

0x0D

Reply(Hex Format)

Name

Length

Command

Type

Command

Value1

Value2

Value3

Hex

0x38

0x30

0x35

0x72

0x62

0x30

0x36

0x37

0x0D

Commercial Display RS-232 Protocol

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Example2: Get Brightness from TV-05 , but the Brightness command ID is error

and it is NOT in the command table.

Send (Hex Format)

Name

Length

Command

Type

Command

Value1

Value2

Value3

Hex

0x38

0x30

0x35

0x67

0XD3

0x30

0x0D

Reply (Hex Format)

Name

Length

Command

Type

Hex

0x34

0x30

0x35

0x2D

0x0D

Example3: Get Tint from TV-0007 and this command is valid.

The Tint value is 32.

Send (Hex Format)

Name

Length

Command

Type

Command

Value1

Value2

Value3

Hex

0x38

0x30

0x37

0x67

0X65

0x30

0x0D

Reply (Hex Format)

Name

Length

Command

Type

Command

Value1

Value2

Value3

Hex

0x38

0x30

0x37

0x72

0x65

0x30

0x33

0x32

0x0D

Example4: Get Tint from TV-07 , but the Brightness command ID is error and it is NOT

in the command table.

Send (Hex Format)

Name

Length

Command

Type

Command

Value1

Value2

Value3

Hex

0x38

0x30

0x37

0x67

0XD7

0x30

0x0D

Reply (Hex Format)

Name

Length

Command

Type

Hex

0x34

0x30

0x37

0x2D

0x0D

Example5: Get SN from TV-01 , but the Brightness command ID is error and it is NOT in

the command table.

Send (Hex Format)

Name

Length

Command

Type

Command

Value1

Value2

Value3

Hex

0x38

0x30

0x31

0x67

0X6B

0x30

0x0D

Reply (Hex Format)

Name

Hex

0x34

0x30

0x37

0x2D

0x0D

Commercial Display RS-232 Protocol

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May 28, 2007 9 / 16 Commercial Display RS-232 Protocol

PC Get-function command to CD5233/CD4233 LCD Monitor

Get Function

Length

Command

Type

Command

Response

Range

Comments

Code

(ASCII)

Code

(Hex)

(Three ASCII

bytes)

Get-Contrast

000 ~ 100

Gets Contrast value

Get-Brightness

000 ~ 100

Gets Brightness value

Get-Sharpness

000 ~ 100

Gets Sharpness value

Get-Color

000 ~ 100

Gets Color value

Get-Tint

000 ~ 100

Gets Tint value

Get-Volume

000 ~ 100

Gets Volume value

Get-Mute

000: OFF

(unmuted)

Gets Mute ON/OFF

status

001: ON (muted)

Get-RCU

000: Disable

Gets RCU mode

status

001: Enable

002: Pass

through

Get-Key Pad

000: Disable

Gets Buttons ON/OFF

status

001: Enable

Get-Input

select

000: VGA

Gets Input select

status

001: HDMI

002: DVI-D

003: AV

004: YPbPr

005: S-Video

Get-Power

status

000: STBY

Gets the status of the

HDTV power.

001: ON

HDTV response:

000 = HDTV is in

standby

001 = HDTV is ON

Get-ACK

This command is

used to test the

communication link.

Commercial Display RS-232 Protocol

Revision 1.x

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May 28, 2007 10 / 16 Commercial Display RS-232 Protocol

4Protocol 2 : without ID

4.1

Set function listing

The PC can control the LCD Monitor for specific actions. The Set-Function command allows you to

control the LCD monitor behavior in a remote sit through the RS232 port. The Set-Function packet

format consists of 5 bytes. Note that the “Value” byte is always = 00.

Set-Function description:

Length:

Total bytes of message = 5 ASCII (35H) excluding “CR”

Command:

Function command code: One byte ASCII code

Value[1~3]:

Three bytes ASCII that defines the value

Set-Function format:

Name

Length

Command

Value1

Value2

Value3

Byte Count

1 Byte

Bytes order

All Set-Function from PC to Monitor (ASCII)

Name

Length

Command

Value1

Value2

Value3

Byte Count

1 Byte

00D

Bytes order

Example: Set Mute-ON command (ASCII)

Name

Length

Command

Value1

Value2

Value3

Byte Count

00D

Bytes order

Example: Set Mute-OFF command (ASCII)

Name

Length

Command

Value1

Value2

Value3

Byte Count

00D

Bytes order

Example: Set Tint to 50 command (ASCII)

Name

Length

Command

Value1

Value2

Value3

Byte Count

„

00D

Bytes order

LCD Monitor will send “+” (02Bh) and “CR” bytes to PC after receiving a valid command.

LCD Monitor will send “-” (02Dh) and “CR” bytes to PC if the command is not valid.

Value Range:

Three bytes ASCII value range

Command Code:

Function command code in ASCII

CD5233/CD4233 set command table

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