Protocol - ViewSonic IFP5550 User Manual

10.3 Protocol

10.3.1 Set-Function Listing
The PC can control the Display for specific actions. The Set-Function command
allows you to control the Display 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"
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
81