65 Piranha 2 User’s Manual
03-032-00493-14 Teledyne DALSA
by the camera ID (addressing a single camera on the network), or space (addressing all
cameras on the network or a Broadcast command).
The camera replies to the network command only if it is addressed directly. The last line
of the camera reply (error or OK message) to the network command is prefixed with the
ID of the camera.
Example: return camera ID for camera a
:a gci
camera id: a
a OK>
Special Case: Empty Network Command
The empty network command is a special case of network commands. If the last
command issued was not a Broadcast command, the empty network command will cause
the addressed camera to output an "OK" message followed by the ">" prompt and
prefixed by the network ID. If the last command issued was a broadcast command, the
empty network command is used to query each camera for its READY/ BUSY status.
Example: empty network command issued
:a CR
a OK>
Broadcast Commands and READY/BUSY Status
Broadcast commands are commands sent to all cameras on the network at the same time.
After a broadcast command is sent, and before issuing the next command, each camera on
the link must be polled until a READY status is returned. A BUSY status indicates that the
camera is not ready to receive the next command.
To poll the status of a networked camera, send an empty network command to each
camera until they each return the READY reply.
Both the READY and BUSY reply consist of six characters: Carriage Return (CR), Line
Feed (LF), and the network ID of the queried camera, followed by a space and either the
BUSY code "0", or the READY code "1" and the prompt character ">".
Example: query command followed by a BUSY reply
:a CR
<CR><LF>a 0>
Example: query command followed by a READY reply
:a CR
<CR><LF>a 1>
After all cameras return the READY status, use the gps to poll each camera for the return
codes of the sent broadcast command.
Note, the QUERY BUSY mode is active only after a broadcast command, normally the
camera does not support this mode of operation. The controlling software must wait for a
reply from the camera before sending the next command.
Camera will not reply to the Broadcast command.
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