Table Of Contents; Communications Setting - Hitachi CP-X253 User Manual

RS-232C Communication
RS-232C Communication
 2 3 4 5
6
8
7 9
CONTROL port
of the projector
Connecting the cable
Turn off the projector and the PC.
.
Connect the CONTROL port of the projector with a RS-232C port of the PC
2.
by a RS-232C cable (cross). Use the cable that fulfills the specification shown
in the previous page.
Turn the PC on, and after the PC has started up turn the projector on.
3.

Communications setting

9200bps, 8N
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_
Action
low high
Action (byte_0 - )
Action Classification
 SET
2 GET
4 INCREMENT
5 DECREMENT
6 EXECUTE
6
RS-232C cable (Cross)
- ()
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 .
Decrement setup value by .
Run a command.
() 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
 2 3 4 5
6
8
7 9
RS-232C port
of the PC