ViewSonic EP4320-2, Руководство пользователя

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12.3. Protocol
12.3.1. Set-Function Listing
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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
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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]:
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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 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