Connecting The Cable - ViewSonic PJL3211 Guide De L'utilisateur

RS-232C Communication
RS-232C Communcaton
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6
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CONTROL port
of the projector

Connecting the cable

Turn off the projector and the PC.
1.
Connect the CONTROL port of the projector wth a RS-232C port of the PC
2.
by a RS-232C cable (cross). Use the cable that fulfills the specification shown
n the prevous page.
Turn the PC on, and after the PC has started up turn the projector on.
3.
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
Acton
low hgh
Acton (byte_0 - 1)
Acton Classification
1 SET
2 GET
4 INCREMENT
5 DECREMENT
6 EXECUTE
ViewSonic
RS-232C cable (Cross)
- (1)
RD (2)
TD (3)
- (4)
GND (5)
- (6)
RTS (7)
CTS (8)
- (9)
byte_2 byte_3
Type
low hgh
Change settng to desred value.
Read projector nternal setup value.
Increment setup value by 1.
Decrement setup value by 1.
Run a command.
(1) CD
(2) RD
(3) TD
(4) DTR
(5) GND
(6) DSR
(7) RTS
(8) DTS
(9) RI
byte_4 byte_5
Settng code
low hgh
Content
58
1 2 3 4 5
6
7 8 9
RS-232C port
of the PC
PJL3211