TECHNICAL - 5
TECHNICAL
T
T
T
T
E
E
E
E
C
C
C
C
H
H
H
H
N
N
N
N
II
II
C
C
C
C
A
A
A
A
L
L
L
L
((
((
c
c
c
c
o
o
o
o
n
n
n
n
tt
tt
ii
ii
n
n
n
n
u
u
u
u
e
e
e
e
d
d
d
d
))
))
RS-232C communication
(1) Turn off the projector and computer power supplies and connect with the RS-232C cable.
(2) Turn on the computer power supply and after the computer has started up, turn on the projector
power supply.
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
Control jack
D-sub 15-pin shrink jack
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
RD
TD
GND
SELO
RTS
1
2
3
4
5
6
7
8
9
CD
RD
TD
DTR
GND
DSR
RTS
CTS
RI
1
2
3
4
5
6
7
8
9
RS-232C jack
D-sub 9-pin
Projector
Computer
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 flag for command data.
CRC_high : Upper byte of CRC flag for command data.
3 Command data
byte_0
byte_1
byte_2
byte_3
byte_4
byte_5
Action
Type
Setting code
low
high
low
high
low
high
Command data chart
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.
3M™ Multimedia Projector MP7740i
© 3M 2002. All Rights Reserved.
