Sony BRC-Z700 - CCTV Camera Lista poleceń - Strona 5
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Command and inquiry
•
Command
Sends operational commands to the BRC-Z700.
•
Inquiry
Used for inquiring about the current state of the BRC-
Z700.
Command Packet
Inquiry
8X QQ RR ... FF
1)
QQ = 01 (Command), 09 (Inquiry)
2)
RR = 00 (Interface), 04 (camera 1), 06 (Pan/Tilter)
X = 1 to 7: BRC-Z700 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-Z700 when it receives a
command. No ACK message is returned for an
inquiry.
•
Completion message
Returned by the BRC-Z700 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
Ack
X0 4Y FF
Completion (Commands)
X0 5Y FF
Completion (Inquiries)
X0 5Y ... FF
X = 9 to F: BRC-Z700 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-Z700 address + 8, Y = socket number
Note
1)
QQ
= Command/Inquiry,
2)
RR
= category code
Note
Y = socket number
Y = socket number
Y = socket number
Socket number
When command messages are sent to the BRC-Z700, 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-Z700 has
two buffers (memories) for commands, so that up to two
commands including the commands currently being
executed can be received. When the BRC-Z700 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-Z700 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
Cancel
8X 2Y FF
X = 1 to 7: BRC-Z700 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.
Note
Y = socket number
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