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 RETURN 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

9.1SETTING UP………………………………………………………………………………………………………..10

9.2CABLES……………………………………………………………………………………………………………..10

9.3COMMUNICATION 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

3.1Legal 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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