Pantera SA 2M30 - Frame Grabbers

Pantera SA DS -21-02M30 and DS-22-02M30 User’s Manual 59
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:
To 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:
To query command followed by a BUSY reply:
a CR
a 0>
Example:
To query command followed by a READY reply:
a CR
a 1>
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.
The camera will not reply to the Broadcast command.
DALSA 03-32-10150-01