6
RS-232C Communication
RS-232C Communication
RS-232C Communication
6
7
8
9
1
2
3
4
5
6
7
8
9
1
2
3
4
5
CONTROL port
RS-232C cable
RS-232C port
of the projector
of the computer
- (1)
(1) CD
RD (2)
(2) RD
TD
(3)
(3)
TD
-
(4)
(4)
DTR
GND (5)
(5) GND
-
(6)
(6)
DSR
RTS (7)
(7) RTS
CTS (8)
(8) DTS
-
(9)
(9)
RI
Connecting the cable
1.
Turn off the projector and the computer.
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 previous page.
3.
Turn the computer on, and after the computer has started up turn the
projector on.
Communications setting
19200bps, 8N1
1. Protocol
Consist of header (7 bytes) + command data (6 bytes).
2. Header
BE + EF + 03 + 06 + 00 + C 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
byte_2
byte_3
byte_4
byte_5
Action
Type
Setting code
low
high
low
high
low
high
Action (byte_0 - 1)
Action
Classifi cation
Content
1
SET
Change setting to desired value.
2
GET
Read projector internal setup value.
4
INCREMENT
Increment setup value by 1.
5
DECREMENT
Decrement setup value by 1.
6
EXECUTE
Run a command.
© 3M 200
4
3M™
Digital
Projector
X45/
S
X55
