VIEWSONIC PJL3211 - Manual (Page 63)

58 ViewSonic PJL3211
RS-232C Communication
RS-232C Communcaton
6 7 8 9
1 2 3 4 5
6 7 8 9
1 2 3 4 5
CONTROL port RS-232C cable (Cross) RS-232C port
of the projector of the PC
- (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 PC.
2. Connect the CONTROL port of the projector wth a RS-232C port of the PC
by a RS-232C cable (cross). Use the cable that fulfills the specification shown
n the prevous page.
3. Turn the PC on, and after the PC has started up turn the projector on.
Communications setting
19200bps, 8N1
1 . Protocol
Consst of header (7 bytes) + command data (6 bytes).
2 . Header
BE + EF + 03 + 06 + 00 + CRC_low + CRC_hgh
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 byte_2 byte_3 byte_4 byte_5
Acton Type Settng code
low hgh low hgh low hgh
Acton (byte_0 - 1)
Acton Classification Content
1 SET Change settng to desred value.
2 GET Read projector nternal setup value.
4 INCREMENT Increment setup value by 1.
5 DECREMENT Decrement setup value by 1.
6 EXECUTE Run a command.