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RS-232 terminal specifications for IN74 and 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 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
.
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)
?
