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Command and inquiry
• Command
Sends operational commands to the BRC-Z330.
• Inquiry
Used for inquiring about the current state of the BRC-
Z330.
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-Z330 address
For actual values to be sent, see Command Lists or
Inquiry Command Lists.
Responses for commands and inquiries
• ACK message
Returned by the BRC-Z330 when it receives a
command. No ACK message is returned for an
inquiry.
• Completion message
Returned by the BRC-Z330 when execution of
commands or inquiries is completed. In the case of
inquiry commands, reply data for the inquiry is
contained after the 3rd byte of the packet. If the ACK
message is omitted, the socket number will contain 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-Z330 address + 8
• Error message
When a command or inquiry command could not be
executed or failed, an error message is returned
instead of a completion message.
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 canceled
X0 6Y 05 FF No socket (to be canceled)
X0 6Y 41 FF Command not executable
X = 9 to F: BRC-Z330 address + 8, Y = socket number
Socket number
When command messages are sent to the BRC-Z330, it
is normal to send the next command message after
receiving the completion message or error message.
However, to deal with advanced uses, the BRC-Z330 has
two buffers (memories) for commands, so that up to two
commands including the commands currently being
executed can be received. (Note that more than 1V
interval is necessary between one command and the
next.)
When the BRC-Z330 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, a
BRC-Z330 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
a Cancel command as the next command. To cancel one
of 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-Z330 address, Y = socket number
Error message “Command canceled” will be returned
for this command, but this is not a fault. It indicates that
the command has been canceled.