ViewSonic VT2756-L - Page 44

Other Information
35
3. Protocol
3.1 Set-Function Listing
The PC can control the TV Monitor for specic actions. The Set-Function command allows you to
control the TV behavior in a remote sit through the RS232 port. The Set-Function packet format
consists of 9 bytes.
Set-Function description:
Length: Total Byte of Message excluding “CR”
TV ID: Identication 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.
The TV ID can be set via the OSD menu for each TV 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
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] The reply for “Power on” command is the exception. It’s 0x322B0D ( 2+<CR>).
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