Vaddio Canon VC-C50i Programmers - Manual (Page 17)

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9. Function of Remote Control
9.1 In General
The ON/OFF status of remote control can be monitored by the computer.
By Remote Control Through command ON, VC-C50i is in the status of through mode and
notify the status of ON/OFF to the computer.
If the control mode is set to remote through ON by host control, the VC-C50i sends the status
corresponding to the pressed key directly to the computer side without performing any operation
for any received remote control code. If the control mode is set to remote through ON by
remote control, the VC-C50i performs the operation corresponding to the received remote control
code, and then sends the status to the computer side.
Note 1 : After just turn on, the function of remote control is of setting the status OFF.
Note 2 : In case of using this function, the software of computer must correspond to full duplex,
in order to be able to receive the remote control through data, even if the computer issues
the commands.
Note 3 : The RTS line must be always ON, in order not to forbid the remote control through data
during the flow control.
Note 4 : The details of the communication timing are referring to 3.3 Communication Timing
Diagram.
9.2 Data Format of Remote Control Through
At the time to receive remote control data, the data format from VC-C50i to the computer is
configured as shown below.
Header Device Num Status End mark
Header : 1 byte FDh Remote Button ON (Pushed)
FCh Remote Button OFF (Released)
Device Num : 2 byte 3030h~3039h (Device number in cascade connection.)
Status
: 2 byte Remote control code indicates hexadecimal, returns its ASCII code.
(refer to 9.3. Table of Remote Control Code)
End mark : 1 byte EFh
Each device return the data of remote control in the status of cascade connection (3031~3039).
Example: Remote Control Button [1] ON
d0 d1 d2 d3 d4 d7
Header Device Num Remote control Code End mark
FDh 30h 3Xh 30h 31h EFh
Example: Remote Control Button [1] OFF
d0 d1 d2 d3 d4 d7
Header Device Num Remote control Code End mark
FCh 30h 3Xh 30h 31h EFh