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DS-24-0<strong>2M30</strong> and DS-25-0<strong>2M30</strong> <strong>User</strong>’s <strong>Manual</strong> 53<br />
The Network Commands<br />
The network command is an ordinary camera command prefixed by a network prefix.<br />
Network prefixes always start with the colon character ":" and are followed immediately<br />
by the camera ID (addressing a single camera on the network), or space (addressing all<br />
cameras on the network or a Broadcast command).<br />
The camera replies to the network command only if it is addressed directly. The last line<br />
of the camera reply (error or OK message) to the network command is prefixed with the<br />
ID of the camera.<br />
Example:<br />
To return camera ID for camera a:<br />
a gci CR<br />
camera id: a<br />
a OK><br />
Special Case: Empty Network Command<br />
The empty network command is a special case of network commands. If the last<br />
command issued was not a Broadcast command, the empty network command will cause<br />
the addressed camera to output an "OK" message followed by the ">" prompt and<br />
prefixed by the network ID. If the last command issued was a broadcast command, the<br />
empty network command is used to query each camera for its READY/BUSY status.<br />
Example:<br />
To empty network command issued:<br />
a CR<br />
a OK><br />
Broadcast Commands and READY/BUSY Status<br />
Broadcast commands are commands sent to all cameras on the network at the same time.<br />
After a broadcast command is sent, and before issuing the next command, each camera on<br />
the link must be polled until a READY status is returned. A BUSY status indicates that the<br />
camera is not ready to receive the next command.<br />
To poll the status of a networked camera, send an empty network command to each<br />
camera until they each return the READY reply.<br />
Both the READY and BUSY reply consist of six characters: Carriage Return (CR), Line<br />
Feed (LF), and the network ID of the queried camera, followed by a space and either the<br />
BUSY code "0", or the READY code "1" and the prompt character ">".<br />
Example:<br />
To query command followed by a BUSY reply:<br />
DALSA 03-32-10157-02