ViewSonic IFP6552-1C, User Manual

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105
Protocol
Set-Function Listing
The PC can control the Display for specific actions. The Set-Function command
allows you to control the Display behavior at a remote site through the RS-232 port.
The Set-Function packet format consists of 9 bytes.
Set-Function Description:
Length:
Total Byte of Message excluding “CR”
LFD ID Identification for each of Display (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 LFD ID can be set via the OSD menu for each Display.
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 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: When PC applies command to all displays (ID=99), only the #1 set needs
to reply by the name of ID=1.