Basler raL2048-48gm Manuel d'utilisateur télécharger pdf (Page 88)

Acquisition Control AW00118302000

78 Basler racer GigE

8.2 Controlling Acquisition

Five major elements are involved in controlling the acquisition of images:

 Acquisition start and acquisition stop commands

 The acquisition mode parameter

 Acquisition start triggering

 Frame start triggering

 Line start triggering

8.2.1 Acquisition Start and Stop Commands and the

Acquisition Mode

The use of Acquisition Start and Acquisition Stop commands and the camera’s Acquisition Mode

parameter setting are related.

Issuing an Acquisition Start command to the camera prepares the camera to acquire frames. You

must issue an Acquisition Start command to the camera before you can begin acquiring frames.

Issuing an Acquisition Stop command to the camera terminates the camera’s ability to acquire

frames. When the camera receives an Acquisition Stop command:

 If the camera is not in the process of acquiring a frame, its ability to acquire frames will be

terminated immediately.

 If the camera is in the process of acquiring a line for a frame, the line acquisition process will

be allowed to finish. Frame acquisition will then be stopped, a partial frame will be transmitted,

and the camera’s ability to acquire frames will be terminated.

The camera’s Acquisition Mode parameter has two settings: single frame and continuous.

If the camera’s Acquisition Mode parameter is set for single frame, after an Acquisition Start

command has been issued to the camera, a single frame can be acquired. When acquisition of one

frame is complete, the camera will internally issue an Acquisition Stop command and can no longer

acquire frames. To acquire another frame, you must issue a new Acquisition Start command.

If the camera’s Acquisition Mode parameter is set for continuous frame, after an Acquisition Start

command has been issued to the camera, frame acquisition can be triggered as desired. Each time

the proper frame and line triggers are applied, the camera will acquire and transmit a frame. The

camera will retain the ability to acquire frames until an Acquisition Stop command has been issued

to the camera. Once the Acquisition Stop command is received, the camera can no longer acquire

frames.

To see graphical representations of the use of the Acquisition Start and Acquisition Stop commands

and the Acquisition Mode parameter, refer to the use case diagrams in Section 8.3 on page 122.

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Basler raL2048-48gm Manuel d'utilisateur Page 88