Communication Timing Diagram - Canon VC-C50i/VC-C50iR Programmer's Manual

3.3 Communication Timing Diagram

Example 1: Basic communication
Computer Side
Power turned on
CTS
RTS
TXD
(Control Command)
RXD
(Answer)
Example 2: Unable to execute the commands due to error
The details are referring to 12.1 Pan Speed Assignment command.
The followings shows the case which causes the error by Pan Speed Assignment command,
when the communication mode isn't host mode. Pan Speed Assignment commands will cause
the error mode under the condition that the communication mode is not host mode.
After the error generated by Pan Speed Assignment command, the Operation Status Request
command is issued and confirms that the error source isn't host mode, then the Host Control
command is issued and Pan Speed Assignment command is again executed.
Computer Side
Pan Speed Setting
TXD
(Control Command)
RXD
(Answer)
Host Control Mode
TXD
RXD
Always ON
execute
Command 1
Answer 1
Fail to execute
Busy + Mode Error
Execute
No error (ACK)
In case unable to receive the answer to the computer
Command 2
Operation Status Request
Pan Speed Setting
10
execute
Answer 2 Answer 2
Suspend
Operation Status
Execute
No error (ACK)