Mitsubishi Electronics UD740U [RS-232C control flowchart], Compatibility with the former models

Page 4

RS-232C control flowchart

No NAK returned

Command is sent successfully.

Command is executed successfully.

START

Sending out command

 

 

No response for

Awaiting response

1 second or longer

from projector

 

 

 

NAK returned

 

 

 

 

 

 

 

Command is sent successfully.

 

 

Command sending fails.

Command execution fails.

 

 

 

 

 

 

 

 

 

 

 

Checking execution of

NG

command (sending out

 

check command)

 

OK

END

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.

→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

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”

To normal operation

0-3

Checking response to “00vST”

4

 

 

 

 

 

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

0

(Former command system),

 

 

4Eh 44h

1

(New command system)

4

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Contents Interface Communications formatPC-controllable functions ConnectionControl command configuration Control sequenceACK/NAK AsciiPage [RS-232C control flowchart] Command[Method of checking state of projector] Compatibility with the former modelsOperation commands Command listReading command diagram +/VOLUME VolumeEfficient Mode KeystoneHow to set the value Audio StbyAKS RstallPassword lock commands PslockExecution procedure of RS-232C commands via LAN