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3. Protocol
3.1 Set-Function Listing
The PC can control the TV/DS for specific 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: Identification for each of TV/DS (01~98; default is 01)
ID “99” means to apply the set command for all connected displays.
Under such circumstances, only ID#1 display 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 defines 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
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 displays (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
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