Communications Setting - Hitachi CP-X1200 User Manual

RS-232CCommunication
RS-232CCommunication
Connecting The Cable
Turn off the projector and the computer power supplies.
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Connect the CONTROL port of the projector with a RS-232C port of the computer by
2
a RS-232C cable. Use the cable that fulfills the specification shown in the previous
page.
Turn on the computer power supply and after the computer has started up, turn on
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the projector power supply.

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
Action
low high
Action (byte_0 - 1)
Action
1 SET
2 GET
4 INCREMENT
5 DECREMENT
6 EXECUTE
byte_2 byte_3
Type
low high
Classification
byte_4 byte_5
Setting code
low high
Content
Change setting to desired value.
Read projector internal setup value.
Increment setup value by 1.
Decrement setup value by 1.
Run a command.
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