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RS-3C Communication
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CONTROL port
of the projector
Connecting the cable
Turn off the projector and the computer.
.
Connect the CONTROL port of the projector with a RS-3C port of
.
the computer by a RS-3C cable (cross). Use the cable that fulfills the
specification shown in the previous page.
Turn the computer on, and after the computer has started up turn the
3.
projector on.
Communications setting
900bps, 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 - )
Classification
Action
SET
GET
4
INCREMENT
5
DECREMENT
6
EXECUTE
RS-3C cable (Cross)
- ()
RD ()
TD (3)
- (4)
GND (5)
- (6)
RTS (7)
CTS (8)
- (9)
byte_
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.
RS-232C Communication (continued)
() CD
() RD
(3) TD
(4) DTR
(5) GND
(6) DSR
(7) RTS
(8) DTS
(9) RI
byte_4
byte_5
Setting code
low
high
Content
3
4
5
6
8
7
9
RS-3C port
of the computer
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