ViewSonic PJL3211 PJL3211 User Guide (English) - Page 63

Connecting the cable, Communications setting

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RS-232C Communication RS-232C Communication 1 23 45 67 8 9 1 23 45 67 8 9 CONTROL port RS-232C cable (Cross) of the projector - (1) (1) CD RD (2) (2) RD TD (3) (3) TD - (4) (4) DTR GND (5) - (6) (5) GND (6) DSR RTS (7) (7) RTS CTS (8) (8) DTS - (9) (9) RI RS-232C port of the PC Connecting the cable 1. Turn off the projector and the PC. 2. Connect the CONTROL port of the projector with a RS-232C port of the PC by a RS-232C cable (cross). Use the cable that fulfills the specification shown in the previous page. 3. Turn the PC on, and after the PC 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 + 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_1 Action low high byte_2 byte_3 Type low high byte_4 byte_5 Setting code low high Action (byte_0 - 1) Action Classification 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. ViewSonic 58 PJL3211

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58
ViewSonic
PJL3211
RS-232C Communication
RS-232C Commun±cat±on
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 w±th a RS-232C port of the PC
by a RS-232C cable (cross). Use the cable that fulfills the specification shown
±n the prev±ous page.
3.
Turn the PC on, and after the PC has started up turn the projector on.
Communications setting
19200bps, 8N1
1° Protocol
Cons±st of header (7 bytes) + command data (6 bytes).
2° Header
BE + EF + 03 + 06 + 00 + CRC_low + CRC_h±gh
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
Act±on
Type
Sett±ng code
low
h±gh
low
h±gh
low
h±gh
Act±on (byte_0 - 1)
Act±on
Classification
Content
1
SET
Change sett±ng to des±red 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.