3M Multimedia Projector H10 Gebruikershandleiding - Pagina 5
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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
RS-232C cross cable
1
2
RD
TD
3
4
GND
5
6
7
8
9
6
1
2
3
4
5
7
RTS
CTS
8
D-sub 9-pin
9
jack
byte_2
byte_3
Type
low
high
Classification
1
CD
2
RD
3
TD
4
DTR
5
GND
5
6
DSR
7
RTS
8
DTS
D-sub 9-pin
9
RI
byte_4
byte_5
Setting code
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.
Computer
RS-232C port
4
3
2
1
1
9
8
7
6
6
D-sub 9-pin
jack
Content
2
3
4
5
7
8
9
plug
5