Hitachi CP-X980W Projector User Manual


 
TECHNICAL - 7
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TECHNICAL
Requesting projector status (Get command)
(1) Send the request code Header + Command data (02H+00H+ type (2 bytes) +00H+00H)
from the computer to the projector.
(2) The projector returns the response code 1DH+ data (2 bytes) to the computer.
Changing the projector settings (Set command)
(1) Send the setting code Header + Command data (01H+00H+ type (2 bytes) + setting code (2
bytes)) from the computer to the projector.
(2) The projector changes the setting based on the above setting code.
(3) The projector returns the response code 06H to the computer.
Using the projector default settings (Reset Command)
(1) The computer sends the default setting code Header + Command data (06H+00H+ type (2
bytes) +00H+00H) to the projector.
(2) The projector changes the specified setting to the default value.
(3) The projector returns the response code 06H to the computer.
Increasing the projector setting value (Increment command)
(1) The computer sends the increment code Header + Command data (04H+00H+ type (2 bytes)
+00H+00H) to the projector.
(2) The projector in creases the setting value on the above setting code.
(3) The projector returns the response code 06H to the computer.
Decreasing the projector setting value (Decrement command)
(1) The computer sends the decrement code Header + Command data (05H+00H+ type (2 bytes)
+00H + 00H) to the projector.
(2) The projector decreases the setting value on the above setting code.
(3) The projector returns the response code 06H to the computer.
When a command sent by the projector cannot be understood by the computer
When the command sent by the projector cannot be understood, the error command 15H is
returned by the computer. Some times, the projector ignores RS-232C commands during other
works. If the error command 15H is returned, please send the same command again.
When data sent by the projector cannot be practice
When the command sent by the projector cannot be practiced, the the error code 1cH +xxxxH is
returned.
When the data length is greater than indicated by the data length code, the projector will ignore the
excess data code.
Conversely, when the data length is shorter than indicated by the data length code, an error code
will be returned to the projector.
Operation cannot be guaranteed when the projector receives an undefined command or
data.
Provide an interval of at least 40ms between the response code and any other code.
The projector outputs test data when the power supply is switched ON, and when the lamp is lit.
Ignore this data.
Commands are not accepted during warm-up.
NOTE