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RS-232 terminal specifications for IN74/IN76/IN76
Communication configuration
To control the projector from an LCD control panel, connect an RS-232 cable
to the serial control connector on the projector and set your computer’s
serial port settings to match this communication configuration:
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 format: (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
:
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 ra
nge 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
.
Setting Value
Bits per second 19,200
Data bits 8
Parity None
Stop bits 1
Flow control None
Emulation VT100
Function Command Response
Brightness (BRT?) (0-22, 10)
Lamp hours (LMP?) (0-9999, 421)
Function Command Response
Brightness (BRT10) Sets the brightness to 10
Power (PWR0) Turns power off
Power (PWR1) Turns power on
Power (PWR9999) ?
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