1.
2.

RS-232C Communication

RS-232C Communication

1

2

3

4

5

6

7

8

 

9

CONTROL port

RS-232C cable (Cross)

of the projector

- (1)

(1)

CD

 

 

RD (2)

(2)

RD

 

TD (3)

 

(3) TD

 

- (4)

(4)

DTR

 

GND (5)

 

(5) GND

 

 

 

- (6)

(6)

DSR

 

RTS (7)

(7)

RTS

 

CTS (8)

(8)

DTS

 

- (9)

(9)

RI

1 2 3 4 5

6 7 8 9

RS-232C port

of the computer

Connecting the cable

Turn off the projector and the computer.

Connect the CONTROL port of the projector with a RS-232C port of the computer by a RS-232C cable (cross). Use the cable that fulfills the

specification shown in the previous page.

3. Turn the computer on, and after the computer has started up turn the projector on.

Communications setting

19200bps, 8N1

1. Protocol

Consist of header (7 bytes) + command data (6 bytes).

2. Header

BE + EF + 03 + 06 + 00 + CRC_low + CRC_high

CRC_low : Lower byte of CRC flag for command data

CRC_high : Upper byte of CRC flag for command data

3.Command data

Command data chart

byte_0

byte_1

byte_2

byte_3

 

byte_4

byte_5

 

Action

 

 

Type

 

Setting code

 

low

high

 

low

high

 

low

 

high

 

Action (byte_0 - 1)

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Action

Classification

 

 

Content

 

 

1

SET

 

Change setting to desired value.

 

2

GET

 

Read projector internal setup value.

 

4

INCREMENT

 

Increment setup value by 1.

 

 

5

DECREMENT

Decrement setup value by 1.

 

 

6

EXECUTE

 

Run a command.

 

 

6

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Hitachi CP-X255 user manual RS-232C Communication, Connecting the cable, Communications setting