Protocol; Set-Function Listing - ViewSonic CDX4952 Guia Del Usuario

10.3. Protocol

10.3.1. 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
Byte Count 1 Byte
Bytes order 1
NOTE: For VT2405LED-1 and VT3205LED, the set "Power on" command is the exception
Reply: (Command Type="+" or "-")
Name Length
Byte Count 1 Byte
Bytes order 1
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
Hex 0x38
Reply (Hex Format)
Name Length
Hex 0x34
Command
ID Command
Type
2 Byte 1 Byte
2~3 4
Command
ID
Type
2 Byte 1 Byte
2~3 4
Command
ID Command
Type
0x30
0x73
0x32
Command
ID
Type
0x30
0x2B
0x32
Value1
1 Byte 1 Byte
5 6
CR
1 Byte
5
Value1
0x24 0x30
CR
0x0D
36
Value2 Value3
1 Byte 1 Byte
7 8
Value2 Value3
0x37 0x36
CR
1 Byte
9
CR
0x0D