Hitachi CP-X253 - Rs-232 C Communication; Default Chapter; Communications Setting

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RS-232C Communication
RS-232C Communication
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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 with a RS-232C port of the PC
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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
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&5&BKLJK8SSHUE\WHRI&5&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.