InFocus LP720 Installation instructions
LP720 RS-232 Command Values
Communication Configuration
To control one of the above noted projectors from an RS-232 control system, connect the serial cable or a null modem cable and
the InFocus RS-232 Adapter (SP-CWRS232) and set the control system serial port settings to match the following communication
configuration*:
RS-232 Port Settings
Setting Value
Bits per second 19,200
Data bits 8
Parity None
Stop bits 1
Flow control None
Emulation VT100
RS-232 Connection for LP720
The RS-232/serial connection for these projectors is located on the PC side of the CableWizard II connection hub. Use the serial
cable (IFS part # 210-0107-xx) to connect the CableWizard II to the serial port of the computer source.
Note: CableWizard3(p/n SP-CW3) does not support RS-232. You must Use CableWizard II (p/n SP-CW2) and the InFocus
serial cable.
Command Format
All commands consist of 3 alpha characters followed by a request, all enclosed in parentheses. The request can be a read request
(indicated by a "?") or a write request (indicated by 1 to 4 ASCII digits).
A read request example:
(AAA?) where
( starts the command
AAA denotes the command
? denotes the read request
) ends the command
A read command returns the range and the current setting, for example:
Read Command Examples
Function Command Response
Brightness (BRT?) (0-22, 10)
Volume (VOL?) (0-80, 0)
Lamp Hours (LMP?) (0-9999, 421)
A write request example:
(AAA####) where
( starts the command
AAA denotes the command
#### denotes the value to be written
(leading zeros not necessary)
) ends the command
Some commands have ranges, while others are absolute. If a number greater than the maximum range is received, it is
automatically set to the maximum number for that function. If a command is received that is not understood, a "?" is returned. With
absolute settings, "0" is off, 1-9999 is on. The one exception is the Power command, where 0 is off and 1 is on.
To assure the projector can process a command, wait 3 seconds before entering the next command.
Write Command Examples
Function Command Response
Brightness (BRT10) Sets the brightness
to 10
Freeze (FRZ1) or
(FRZ8888) Freezes the display
Power (PWR0) Turns power off
Power (PWR1) Turns power on
Error Conditions
Not all commands are supported for all projectors. If an unsupported command is issued, the command will be ignored. If a
command is received that is not understood, a ‘?’ character will be returned indicating the command was not understood.
Limitations
The CLI cannot respond to commands coming in at a high-rate. Therefore, a delay must occur between commands to ensure that
the command gets properly executed. To assure the projector can process a command, wait 3 seconds before entering the next
command.
The following table lists the RS-232 command value ranges for controlling the LP720.
Note: Specified commands and values apply to the LP720 with version 3.04 software or higher. The version number of the
software is the first number listed in the upper right corner of the on-screen menu. Command values for LP720s with earlier
software versions may vary. If your LP720 does not have version 3.04 software or higher, go to the Software/Downloads page to
download and upgrade the projector software.
For absolute command value ranges of 0 - 1, 0 = "Off" and 1-9999 = "On" unless otherwise noted.
Range
Data Source
(Computer) Video Source
Function Command
Min-Max, Initial Value Min-Max, Initial Value
Power (write
only) ("PWR") N/A N/A
Brightness ("BRT") 0-22,11 0-255,129
Tint ("TNT") 0-22,11 0-63,33
Contrast ("CON") 0-22,11 0-127,63
ColorTemp ("TMP") N/A N/A
Saturation ("CLR") N/A 0-63,37
Optimize ("OPT") N/A N/A
VideoFmt ("VSU") N/A 0-4,0
Volume ("VOL") 0-80,40 0-80,40
Balance ("BAL") 0-31,16 0-31,16
Treble ("TRB") 0-14,7 0-14,7
Bass ("BAS") 0-14,7 0-14,7
Fade ("FAD") 0-31,16 0-31,16
Ambiance ("AMB") 0-37,19 0-37,19
Mute ("MTE") 0-1,0 0-1,0
Manual Tracking ("MTS") 0-63,32* N/A
Manual Sync ("MSS") 0-19,10* N/A
Horiz Position ("HPS") 0-63,32* N/A
Vertical Position ("VPS") 0-63,32* N/A
Auto Image ("AIM") 0-1,1 N/A
Resize ("ARZ") 0-1,1 0-1,1
Freeze ("FRZ") 0-1,0 0-1,0
Language ("LAN") 0-3,0 0-3,0
Ceiling ("CEL") 0-1,0 0-1,0
Rear Project ("REA") 0-1,0 0-1,0
Reset ("RST") 0-1,0 0-1,0
Auto Source ("ASC") 0-1,0 0-1,0
Default Source ("DSC") 0-1,0 0-1,0
Blank Screen ("BSC") 0-1,0 0-1,0
Menu Position ("MPS") N/A N/A
Standby Time ("SBT") N/A N/A
Display
Messages ("DMG") N/A N/A
Display Startup
Screen ("DSU") N/A N/A
Standby Mode ("STB") 0-1,0 0-1,0
Source ("SRC") 0-1,0
0 = computer
1 = video
0-1,0
0 = computer
1 = video
Bulb Clock (read
only) ("LMP") 0-9999,0 0-9999,0
*Software dynamically changes range based on the signal received.
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