Communications Setting - Hitachi PJ-TX10W User Manual

RS-232C Communication
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. Use the cable that fulfills the specification shown in the following figure.
(3) Turn on the computer power supply and after the computer has started up, turn on the
projector power supply.
Projector
CONTROL
port
9 8 7 6
5 4 3 2 1
D-sub 9-pin
plug

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
Action
low high
Action (byte_0 - 1)
Action
1 SET
2 GET
4 INCREMENT
5 DECREMENT
6 EXECUTE
4
RS-232C cross cable
RD
TD
GND
6 7 8 9
1 2 3 4 5
RTS
CTS
D-sub 9-pin
jack
byte_2 byte_3
Type
low high
Classification
1 1
CD
2 2 RD
3 3
TD
4 4
DTR
5 5
GND
6 6
DSR
7 7
RTS
8 8
DTS
9 9
RI
byte_4
Setting code
low
Change setting to desired value.
Read projector internal setup value.
Increment setup value by 1.
Decrement setup value by 1.
Run a command.
5 4 3 2 1
9 8 7 6
D-sub 9-pin
jack
byte_5
high
Content
Computer
RS-232C port
1 2 3 4 5
6 7 8 9
D-sub 9-pin
plug