ViewSonic VT4236LED User Manual page 44

Other Information
3. Protocol
3.1 Set-Function Listing
The PC can control the TV Monitor for specific 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:
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.
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 defines the value
CR: 0x0D
Set-Function format:
Send: (Command Type= "s")
Length
Name
Byte Count 1 Byte
Bytes order 1
Reply: (Command Type= "+" or "-")
Length
Name
Byte Count 1 Byte
Bytes order 1
[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)
Length
Name
Hex 0x38
Reply (Hex Format)
Length
Name
Hex 0x34
ID Command
Type
2 Byte 1 Byte
2~3 4
ID Command Type
2 Byte 1 Byte
2~3 4
ID Command Type
0x30 0x73
0x32
ID Command Type
0x30 0x2B
0x32
Command Value1
1 Byte 1 Byte
5 6
CR
1 Byte
5
Command Value1
0x24 0x30
CR
0x0D
35
Value2 Value3 CR
1 Byte 1 Byte 1 Byte
7 8 9
Value2 Value3 CR
0x37 0x36 0x0D