Sony FCB-EX2400 Technical Manual page 33

Responses for commands and inquiries
Acknowledge message

Returned by the FCB camera when it receives a
command. No Acknowledge message is returned for
inquiries.
Completion message

Returned by the FCB camera 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
Acknowledge message is omitted, the socket number
will contain 0.
Reply Packet
Acknowledge X0 4Y FF
Completion (commands) X0 5Y FF
Completion (Inquiries) X0 5Y ... FF
X = 9 to F: FCB camera address + 8
Error message

When a command or inquiry command could not
be executed or failed, an error message is returned
instead of the completion message.
Error Packet Description
X0 6Y 01 FF Message length error (>14 bytes)
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: FCB camera address + 8, Y = socket number
Socket number
When command messages are sent to the FCB camera,
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 FCB
camera has two buffers (memories) for commands, so
that up to two commands including the commands
currently being executed can be received. When the
FCB camera receives commands, it notifies the sender
which command buffer was used using the socket
number of the Acknowledge 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, an FCB camera management command and some
inquiry messages can be executed.
The Acknowledge 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
X = 1 to 7: FCB camera address, Y = socket number
An error message will be returned for this command,
but this is not a fault. It indicates that the command has
been canceled.
Note
Y = socket number
Y = socket number
Y = socket number
Cancel Packet Note
8X 2Y FF Y = socket number
Command List