Hitachi CP-X880W User Manual - Page 18
Rs-232c Communication
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RS-232C COMMUNICATION (1) Turn off the projector and computer power supplies, and connect with the RS-232C adapter via 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 DTS 9 RI RS-232C adapter 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. 5