Mitsubishi Electronics XD250U RS-232C control flowchart, Method of checking state of projector

[RS-232C control flowchart]

	START
	Sending out command
No NAK returned		No response for
	Awaiting response	1 second or longer
	from projector
	NAK returned

Command is sent successfully.

Command is executed successfully.

Checking execution of command (sending out check command)

OK

END

Command is sent successfully.

Command execution fails.

Check the following.

•Check that the function code is correct.

•Check that the data code is correct.

•Check that the projector is able to issue the return command.

NG	Check the projector’s operation using
	the 00vST command.
	Note: In the following cases, NAK is
	returned even when the projector is
	in normal condition.

•Immediately after the power is turned on (about 20 seconds to 2 minutes)

•During input switching

•During auto positioning

•During password lock

Command sending fails.

Check the following.

•Check that the command begins with “00”.

•The projector is not supplied with AC power.

Check that AC power cord is connected.

Turn on the power. (Turn on the circuit breaker or main switch.)

•Not connected with the projector.

Check that the RS-232C cable is connected.

Check the RS-232C cable for electrical discontinuity.

[Method of checking state of projector]

Sending “00vST”

0-3	4
To normal operation	Checking response to “00vST”
6	5

Projector error

Send out “00vER” to check error details.

Recover from error state.

Enter password.

Send out “00PASS****.”

Projector is functioning.

[Compatibility with the former models]

To use the RS-232C commands designed for the former models of Mitsubishi projector, by inputting “00COMMAND0”, the projector responds in the same way as the former models. (No NAK is returned.)

(For the recommended procedure to use the former command systems, see “Controlling the projector using a personal computer” for FL7000U.)

ITEM		Function		Data
	Character	ASCII
Changing the RS-232C command system	COMMAND	43h 4Fh 4Dh 4Dh 41h 4Eh 44h	0	(Former command system),
			1	(New command system)

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