Infocus LP790HB, LP790 User Manual
InFocus LP790 RS232 Commands
1 PURPOSE.......................................................................................................................................3
2 SCOPE.............................................................................................................................................3
3 FUNCTION TYPE........................................................................................................................3
3.1 LEGAL ARGUMENTS.........................................................................................................................................................................3
4 COMMAND RE TURN CODES...................................................................................................4
5 COMMAND SYNTAX..................................................................................................................4
5.1 DELIMITER.........................................................................................................................................................................................4
5.2 SEPARATOR........................................................................................................................................................................................4
5.3 COMMAND EXAMPLE .......................................................................................................................................................................4
6 ERROR SYNTAX..........................................................................................................................5
6.1 ERROR EXAMPLE..............................................................................................................................................................................5
7 TRANSACTION EXAMPLES.....................................................................................................6
8 TABLE OF FUNCTIONS.............................................................................................................7
9 SETUP RECOMMENDATION.................................................................................................10
9.1 SETTING UP ………………………………………………………………………………………………………..10
9.2 CABLES……………………………………………………………………………………………………………..10
9.3 COMMUNICATION PROTOCOL …………………………………………………………………………………10
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1 PURPOSE
This document describes the Projector Management Protocol between the Projector and a Computer (Host). The Protocol is
based on a ASCII commands. By using this protocol a Host will be able control the projector on a physical link.
2 SCOPE
The physical link is not defined in this document. Therefore the protocol can either be implemented on top of RS-232, USB,
Ethernet or other forthcoming communication methods.
3 FUNCTION TYPE
The Function is grouped in four different function types:
Function type Comments
Execute An execute function executes an action on the projector, i.e.
only one state.
State A State function performs a set operation from a predefined
list of states. Not all values in the range
have to be legal.
Adjust An adjust function is characterized by Maximum >
Minimum. And all the integer values between Minimum and
Maximum are legal.
Query A query function is a read only function.
Table 1
3.1 Legal Arguments
Each Function type has a set of legal arguments:
Function type Argument Comments
State <decimal number> Sets the function to the required state.
Adjust + Increases the value of the function one step.
Adjust - Decreases the value of the function one step.
Adjust <decimal number> Sets the value of the function to the specific number.
All ? Requests current, max and min value of the function.
Execute E Executes an action.
All S? Returns ‘0’ if function is not supported
Return ‘1’ if function is supported
All C Returns Current Value
All X Return max value
All M Returns min value
All D Set the function to the default value
Table 2
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