Control Port; Connecting The Cable; Communications Setting - Hitachi CP-X445 User Manual

RS-232C Communication
RS-232C Communication RS-232C Communication
9 8
7 6
3 2 1
5 4

CONTROL port

of the projector

Connecting the cable

Turn off the projector and the computer.
1.
Connect the CONTROL port of the projector with a RS-232C port of
2.
the computer by a RS-232C cable (cross). Use the cable that fulfills the
specifi cation shown in the previous page.
Turn the computer on, and after the computer has started up turn the
3.
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 fl ag for command data
CRC_high : Upper byte of CRC fl ag for command data
3. Command data
Command data chart
byte_0 byte_1
Action
low high
Action (byte_0 - 1)
Action Classifi cation
1 SET
2 GET
4 INCREMENT
5 DECREMENT
6 EXECUTE
6
RS-232C cable (Cross)
- (1)
RD (2)
TD (3)
- (4)
GND (5)
- (6)
RTS (7)
CTS (8)
- (9)
byte_2 byte_3
Type
low high
Change setting to desired value.
Read projector internal setup value.
Increment setup value by 1.
Decrement setup value by 1.
Run a command.
(1) CD
(2) RD
(3) TD
(4) DTR
(5) GND
(6) DSR
(7) RTS
(8) DTS
(9) RI
byte_4 byte_5
Setting code
low high
Content
1 2 3 4 5
6
8
7 9
RS-232C port
of the computer