Hitachi X995 User Manual - Page 31

RS-232C communication, Communications setting

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TECHNICAL (continued) 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. Control jack D-sub 15-pin shrink jack Projector 1 2 3 4 5 SELO 6 RTS 7 8 9 GND 10 11 12 RD 13 TD 14 15 Computer 1 CD 2 RD 3 TD 4 DTR 5 GND 6 DSR 7 RTS 8 CTS 9 RI RS-232C jack D-sub 9-pin 1 2345 6789 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 byte_2 byte_3 byte_4 byte_5 Action Type Setting code low high low high low high Action 1 2 4 5 6 Action (byte_0 - 1) Classification Content SET Change setting to desired value. GET Read projector internal setup value. INCREMENT Increment setup value by 1. DECREMENT Decrement setup value by 1. EXECUTE Run a command. TECHNICAL - 6

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TECHNICAL - 6
T
T
E
E
C
C
H
H
N
N
I
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C
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A
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L
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(continued)
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.
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 + 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
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.