Hitachi CPX301 Operation Manual - Page 82

Hitachi CPX301 - CP XGA LCD Projector Manual

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RS-232C Communication RS-232C Communication 1 6 2 7 3 8 4 9 5 1 6 2 7 3 8 4 9 5 CONTROL port of the projector RS-232C cable (cross) - (1) RD (2) TD (3) - (4) GND (5) - (6) RTS (7) CTS (8) - (9) (1) CD (2) RD (3) TD (4) DTR (5) GND (6) DSR (7) RTS (8) DTS (9) RI RS-232C port of the computer Connecting the cable 1. Turn off the projector and the computer. the CONTROL port of the projector with a RS-232C port of 2. Connect WKHFRPSXWHUE\D56&FDEOH FURVV 8VHWKHFDEOHWKDWIXO¿OOVWKH 3. VSHFL¿FDWLRQVKRZQLQWKHSUHYLRXVSDJH 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 + CRC_low + CRC_high &5&BORZ/RZHUE\WHRI&5&ÀDJIRUFRPPDQGGDWD &5&BKLJK8SSHUE\WHRI&5&ÀDJIRUFRPPDQGGDWD 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 &ODVVL¿FDWLRQ 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. 7

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7
RS-232C Communication
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
WKH#FRPSXWHU#E\#D#n6=ABA&#FDEOH#5FURVV81#oVH#WKH#FDEOH#WKDW#IXO¿OOV#WKH#
VSHFL¿FDWLRQ#VKRZQ#LQ#WKH#SUHYLRXV#SDJH1
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 + CRC_low + CRC_high
&n&uORZa#jRZHU#E\WH#RI#&n&#ÀDJ#IRU#FRPPDQG#GDWD
&n&uKLJKa#oSSHU#E\WH#RI#&n&#ÀDJ#IRU#FRPPDQG#GDWD
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
&ODVVL¿FDWLRQ
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