52
ED-X31E / ED-X33E (C14B-20)
5. RS-232C communication
Connecting the cable
1.
Turn off the projector and the computer.
2.
Connect the CONTROL port of the projector with a RS-232C port of
the computer by a RS-232C cable (cross). Use the cable that fulfi lls the
specifi cation shown in the previous page.
3.
Turn the computer on, and after the computer 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 + C CRC_high
CRC_low: Lower byte of CRC fl ag for command data
CRC_high: Upper byte of CRC fl ag for command data
3. Command data
Command data chart
byte_0
byte_1
byte_2
byte_3
byte_4
byte_5
Action
Type
Setting code
low
high
low
high
low
high
Action (byte_0 - 1)
Action
Classifi cation
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.
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 computer
- (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
