Mitsubishi Electronics XD8100U manual Control command configuration, Ack/Nak

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2. Control command configuration

The command consists of the address code, ID code, function code, data code, ACK/NAK, and end code. The length of the command varies among the functions.

 

Address code

ID code

Function code

Data code

 

ACK/NAK

End code

 

ASCII code

 

‘30h’ ‘30h’

‘30Bh’ ID ‘30Bh’

Function

Data

 

‘3Ah’ ‘4Eh’

‘0Dh’

 

Character

 

00

;ID;

Function

Data

 

:N

 

 

[Address code]

Fixed to 00. (‘30h’ ‘30h’ in the ASCII code)

 

 

 

 

 

[ID code]

Code specifying the projector to be controlled (For ID, specify either the PROJETOR ID (00 to

 

 

63) or GROUP ID (0A to 0Z). When the code is not specified, all the connected projectors are

 

 

controlled.)

 

 

 

 

 

 

[Function code]

Code unique to each control operation.

 

 

 

 

 

[Data code]

Data (value) unique to each control operation (Not always indicated.)

 

 

[ACK/NAK]

Code indicating the NAK return as described below

 

 

 

 

 

Fixed to :N (‘3Ah’ ‘3Eh’ in the ASCII code. Not added to ACK.)

 

 

 

[End code]

Fixed to

. (‘0Dh’ in the ASCII cade)

 

 

 

 

 

3. Control sequence

[Example]

When the personal computer and two projectors are daisy-chained:

 

 

 

 

 

 

 

 

Computer

Projector 2

 

Sequence

Note

 

Projector 1

 

 

 

 

 

 

 

1

Send the command from the

 

 

1

 

 

 

personal computer to the projector.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

3

 

2

 

 

The command input from the

 

 

 

 

 

2

SERIAL IN terminal is sent to the

 

 

 

 

3

 

 

 

 

 

 

projector connected to the SERIAL

 

 

 

 

 

 

 

 

 

4

 

 

 

 

OUT terminal.

 

 

 

 

 

 

After receiving the end code, the

If the projector does not receive commands

 

 

 

 

 

 

 

5

 

 

 

 

projector sends the return command

normally, that is, if the projector is not connected

 

 

 

 

 

to the device connected to the

physically or unable to receive commands, it does

 

 

 

5

 

 

 

6

 

 

 

SERIAL IN terminal.

not send out a return command.

 

 

 

 

 

 

 

 

6

 

 

 

In addition, when the ID code of the command is not

 

 

 

 

 

3

 

corresponded to that of the projector, the projector

 

6

 

 

 

 

 

doesn’t send a return command.

 

 

 

 

 

 

 

The projector sends out a return command within

 

 

 

 

 

 

 

one second at the latest.

 

 

 

 

 

 

 

 

 

 

 

 

 

 

When the received command cannot be executed,

 

 

 

 

 

 

 

NAK is returned (as described below).

 

 

 

 

 

 

The return command input from the

The personal computer receives the commands as

 

 

 

 

 

 

SERIAL OUT terminal is sent to the

many as the number of the projectors that send the

 

 

 

 

 

4

device connected to the SERIAL IN

returned commands. However, the receiving order

 

 

 

 

 

 

terminal.

of the returned commands may vary depending

 

 

 

 

 

 

 

on the projector status.

 

 

 

 

 

 

The personal computer checks the

 

 

 

 

 

 

5

command and confirms if the sent

 

 

 

 

 

 

 

command has been received or not.

 

 

 

 

 

 

 

Use the check command to see

This projector sends various codes other than the

 

 

 

 

 

6

if the projector has executed the

return code. When having a control sequence by

 

 

 

 

 

command.

RS-232C, reject other codes from the personal

 

 

 

 

 

 

 

 

 

 

 

 

 

computer.

NAK return

In the following cases, the projector returns the command with “:N” added.

(1)Though the command sent from the computer is received by the projector successfully, it cannot be executed because the projector is in the operation prohibition state.

(2)The data length of the sent command is incorrect or the command is invalid.

(3)The ID assigned to the command is out of the valid range (other than 00 to 63 or 0A to 0Z).

(4)The signal length of the command is 48 bytes or longer.

When a command is sent out during the following operations, it may not be executed.

(1)During signal switching

(2)In the process of the auto position

(3)After the power is turned on.

After the power is turned on, no command is received until the image is displayed. (Usually, it takes about 20 seconds. However, when the lamp illumination takes time, more time will be required accordingly.) In this case, the projector returns the received command with NAK added.

The return command is sent out within 1 second at the latest.

When sending commands successively, wait to receive the return command of the current command before sending a next command.

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Contents Connection CommandPC-controllable functions Compatibility with the former modelsCommunications format ACK/NAK Control command configurationCommand for Power on is sent to RS-232C control flowchart Method of checking state of projectorEND Reading command diagram Command list Operation commandsNext Lamp Relay ResolutionLamp 1 Time LOW Lamp 2 Time LOWGeometry Super ResolutionZOOM/FOCUS Lens ShiftKsrst KSHHORIZ. Curved ARC VERT. Curved ARC Bright UniformitySuper Resolution Dhdlv USER-GAMMA Mode Color Enhancer CEU1BMULTI-SCREEN Gamma Mode Color Enhancer CEU2B Super Resolution DHDMode DVI Long Cable Dviclv Lens Shift Reset LsrstAuto Power on Apon Auto Power OFF ApofALL SIGNALS, 1 Video only Reset Color Matching CMCManual Reset Color Matching Msml Measure Reset AspectSET UP STU Password Function PslockCinema Mode Video Signal00APON1 00CEU1GS2 Pass Password lock commandsExecution procedure of RS-232C commands via LAN