RS-232 terminal specifications for IN74 and IN76
Communication configuration
To control the projector from an LCD control panel, connect an
Setting | Value |
Bits per second | 19,200 |
Data bits | 8 |
Parity | None |
Stop bits | 1 |
Flow control | None |
Emulation | VT100 |
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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:
Function | Command | Response |
Brightness | (BRT?) | |
Lamp hours | (LMP?) | |
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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,
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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