ViewSonic EP3220T User Manual

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12.3. Protocol
12.3.1. Set-Function Listing
The PC can control the TV/DS for specic actions. The Set-Function command allows you to control the TV/
DS behavior in a remote site through the RS232 port. The Set-Function packet format consists of 9 bytes.
Set-Function description:
Length: Total Byte of Message excluding “CR”.
TV/DS ID Identication for each of TV/DS (01~98; default is 01)
ID “99” means to apply the set command for all connected posters. Under such
circumstances, only ID#1 poster has to reply.
The TV/DS ID can be set via the OSD menu for each TV/DS set.
Command Type Identify command type,
“s” (0x73h) : Set Command
“+” (0x2Bh) : Valid command Reply
“-“ (0x2Dh) : Invalid command Reply
Command: Function command code: One byte ASCII code.
Value[1~3]: Three bytes ASCII that denes the value.
CR 0x0D
Set-Function format
Send: (Command Type=”s”)
Name Length ID
Command
Type
Command Value1 Value2 Value3 CR
Byte Count 1 Byte 2 Byte 1 Byte 1 Byte 1 Byte 1 Byte 1 Byte 1 Byte
Bytes order 1 2~3 4 5 6 7 8 9
NOTE: For VT2405LED-1 and VT3205LED, the set “Power on” command is the exception
Reply: (Command Type=”+” or “-”)
Name Length ID
Command
Type
CR
Byte Count 1 Byte 2 Byte 1 Byte 1 Byte
Bytes order 1 2~3 4 5
NOTE:
1. The reply for “Power on” command is the exception for VT2405LED-1 and VT3205LED.
It’s 0x322B0D ( 2+<CR>).
2. When PC applies command to all posters (ID=99), only the #1 set needs to reply by the name of ID=1.
Example1: Set Brightness as 76 for TV-02 and this command is valid
Send (Hex Format)
Name Length ID
Command
Type
Command Value1 Value2 Value3 CR
Hex
0x38
0x30
0x32
0x73 0x24 0x30 0x37 0x36 0x0D
Reply (Hex Format)
Name Length ID
Command
Type
CR
Hex
0x34
0x30
0x32
0x2B 0x0D

ViewSonic EP3220T Specifications

General

Brand	ViewSonic
Model	EP3220T
Category	Monitor
Language	English