Communications Setting - Hitachi ED-A100 User's Manual - Safety Manual

RS-232C Communication
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CONTROL port
of the projector
Connecting the cable
Turn off the projector and the computer.
1.
Connect the CONTROL port of the projector with a RS-232C port of
2.
Turn the computer on, and after the computer has started up turn the
3.
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
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
RS-232C cable (cross)
- (1)
RD (2)
TD (3)
- (4)
GND (5)
- (6)
RTS (7)
CTS (8)
- (9)
byte_2 byte_3
Type
low high
Change setting to desired value.
Read projector internal setup value.
Increment setup value by 1.
Decrement setup value by 1.
Run a command.
RS-232C Communication
(1) CD
(2) RD
(3) TD
(4) DTR
(5) GND
(6) DSR
(7) RTS
(8) DTS
(9) RI
byte_4 byte_5
Setting code
low high
Content
1 2 3 4
5 6 8
7 9
RS-232C port
of the computer
7