Vaddio Sony BRC-H700 - Manual (Page 5)

5
Command and inquiry
z Command
Sends operational commands to the BRC-H700.
z Inquiry
Used for inquiring about the current state of the
BRC-H700.
Command Packet Note
Inquiry 8X QQ RR ... FF QQ 1) = Command/Inquiry,
RR 2) = category code
1) QQ = 01 (Command), 09 (Inquiry)
2) RR = 00 (Interface), 04 (camera 1), 06 (Pan/Tilter)
X = 1 to 7: BRC-H700 address
For actual values to be sent, see Command Lists or
Inquiry Command Lists.
Responses for commands and inquiries
z ACK message
Returned by the BRC-H700 when it receives a
command. No ACK message is returned for
inquiries.
z Completion message
Returned by the BRC-H700 when execution of
commands or inquiries is completed. In the case of
inquiry commands, it will contain reply data for the
inquiry after the 3rd byte of the packet. If the ACK
message is omitted, the socket number will contain a
0.
Reply Packet Note
Ack X0 4Y FF Y = socket number
Completion (commands) X0 5Y FF Y = socket number
Completion (Inquiries) X0 5Y ... FF Y = socket number
X = 9 to F: BRC-H700 address + 8
z Error message
When a command or inquiry command could not be
executed or failed, an error message is returned.
Error Packet Description
X0 6Y 01 FF Message length error
X0 6Y 02 FF Syntax Error
X0 6Y 03 FF Command buffer full
X0 6Y 04 FF Command cancelled
X0 6Y 05 FF No socket (to be cancelled)
X0 6Y 41 FF Command not executable
X = 9 to F: BRC-H700 address + 8, Y = socket number
Socket number
When command messages are sent to the BRC-H700,
it is normal to send the next command message after
waiting for the completion message or error message
to return. However to deal with advanced uses, the
BRC-H700 has two buffers (memories) for commands,
so that up to two commands including the commands
currently being executed can be received. When the
BRC-H700 receives commands, it notifies the sender
which command buffer was used using the socket
number of the ACK message.
As the completion message or error message also has a
socket number, it indicates which command has ended.
Even when two command buffers are being used at
any one time, a BRC-H700 management command and
some inquiry messages can be executed.
The ACK message is not returned for these commands
and inquiries, and only the completion message of
socket number 0 is returned.
Command execution cancel
To cancel a command which has already been sent,
send the Cancel command as the next command. To
cancel one of any two commands which have been
sent, use the cancel message.
Cancel Packet Note
Cancel 8X 2Y FF Y = socket number
X = 1 to 7: BRC-H700/P address, Y = socket number
The Command canceled error message will be returned
for this command, but this is not a fault. It indicates
that the command has been canceled.