Dukane 8776-RJ - Manual (Page 75)

7
RS-232C Communication (continued)
RS-3C Communication
6 7 8 9
  3 4 5
6 7 8 9
  3 4 5
CONTROL port RS-3C cable (Cross) RS-3C port
of the projector of the computer
- () () CD
RD () () 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
.
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.
3.
Turn the computer on, and after the computer has started up turn the
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_ byte_ byte_3 byte_4 byte_5
Action Type Setting code
low high low high low high
Action (byte_0 - )
Action
Classification
Content
 SET Change setting to desired value.
 GET Read projector internal setup value.
4 INCREMENT Increment setup value by .
5 DECREMENT Decrement setup value by .
6 EXECUTE Run a command.