Hitachi PJ TX300 - Cine Master - LCD Projector Owner's Manual

10. RS-232C communication
9 8 7 6
3 2 1
5 4
CONTROL port
of the projector
Connecting the cable
(1) Turn off the projector and the computer power supplies.
(2) 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 on the computer power supply and after the computer has started up, turn on the projector power
supply.

Communications setting

19200 bps, 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
Action
low high
Action (byte_0 - 1)
Action
1 Set
2 Get
4 Increment
5 Decrement
6 Execute
PJ-TX300(C11H2)
cable(Cross)
- (1)
RD (2)
TD (3)
- (4)
GND (5)
- (6)
RTS (7)
CTS (8)
- (9)
byte_2 byte_3
Type
low high
Classification
RS-232C
(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
Change setting to desired value.
Read projector internal setup value.
Increment setup value by 1.
Decrement setup value by 1.
Run a command.
41
1 2 3 4 5
6
7 8 9
RS-232C port
of a computer