VIEWSONIC CD4220 - Manual (Page 48)

5.
Protocol 1 : with ID
5.1 Command Description
Length: Total Byte of Message excluding “CR”
TV ID Identification for each of TV
Command Type
Identify command type,
“s” (0x73h) : Set Command
“g” (0x67h) : Get Command
“r” (0x72h) : Reply Command
“p” (0x70h) : RCU Pass-through
“+” (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
5.2 Set-Function Listing
The PC can control the LCD Monitor for specific actions. The Set-Function command allows you to
control the LCD monitor behavior in a remote sit through the RS232 port. The Set-Function packet
format consists of 11 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.
Command Type Identify command type,
“s” (0x73h) : Set Command
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
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
Example2: Set Brightness as 176 for TV-02 and this command is NOT valid
Send (Hex Format)
Name Length ID Command Type Command Value1 Value2 Value3 CR
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