Technical Guide - InFocus

Daisy Chain Communication
Command data
Requesting projector status (Get command)
(1) Send the following request code from the PC to the projector.
Header + Command data (‘02H’ + ‘00H’ + type (2 bytes) + connection ID (2
bytes))
(2) The projector returns the response code to the PC.
‘9DH’ + ‘02H’ + connection ID (2 bytes) + data (2 bytes)
When the projector cannot understand the received command, the error code
is sent back to the PC.
‘95H’ + ‘02H’ + connection ID (2 bytes) + ‘00H’ + ‘00H’
When the projector cannot execute the received command, the error code is
sent back to the PC.
‘9CH’ + ‘02H’ + connection ID (2 bytes) + error code (2 bytes)
Action (byte_0-1)
Error Code
Error Code
Content
0 The command was not accepted because the projector connected to PC
was busy.
1 Communication error occurred between projectors.
2 The command was not accepted because the designated projector was
not found.
Changing the projector settings (Set command)
(1) Send the following request code from the PC to the projector.
Header + Command data (‘01H’ + ‘00H’ + type (2 bytes) + setting code (2 bytes))
(2) The projector changes the setting based on the above setting code.
(3) Projector does not send out the response data.
Using the projector default settings (Reset Command)
(1) The PC sends the following default setting code to the projector.
Header + Command data (‘06H’ + ‘00H’ + type (2 bytes) + ‘00H’ + ‘00H’)
(2) The projector changes the specified setting to the default value.
(3) Projector does not send out the response data.
Increasing the projector setting value (Increment command)
(1) The PC sends the following increment code to the projector.
Header + Command data (‘04H’ + ‘00H’ + type (2 bytes) + ‘00H’ + ‘00H’)
(2) The projector increases the setting value on the above setting code.
(3) Projector does not send out the response data.
Decreasing the projector setting value (Decrement command)
(1) The PC sends the following decrement code to the projector.
Header + Command data (‘05H’ + ‘00H’ + type (2 bytes) + ‘00H’ + ‘00H’)
(2) The projector decreases the setting value on the above setting code.
(3) Projector does not send out the response data.
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