Blackfly - CYLOD

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Point Grey Blackfly Technical Reference 2 Blackfly Installation Here are some packet size/packet delay combinations you can use with any image size, pixel format combination. Frame rate will be limited depending on total bandwidth. To allocate 25 MB ~20% of bandwidth Packet Size = 9000 Packet Delay = 5900 Packet Size = 1400 Packet Delay = 900 To allocate 55 MB ~45% of bandwidth Packet Size = 9000 Packet Delay = 1800 Packet Size = 1400 Packet Delay = 255 Bandwidth Requirements for Multiple Cameras Multiple cameras can be set up in two ways: 1) Each camera is connected directly to a single Ethernet port; or, 2) multiple cameras are connected to a single port through an Ethernet switch. If using the first method, each camera has the full bandwidth allocation available to it. If using the second method, the combination of all cameras on a switch cannot exceed the available bandwidth. Related Knowledge Base Articles Title Article Setting Up Multiple GigE Cameras Knowledge Base Article 390 2.4.4 Configuring Other Network Settings The following GigE Vision bootstrap registers can be used for configuring the camera on the network. All registers are implemented according to the GigE Vision standard. A listing of all network-related bootstrap registers supported on the camera is provided in GigE Vision Bootstrap Registers on page 74. 2.4.4.1 Stream Channel Destination Address The stream channel destination address (SCDA) register is used to specify the streaming destination IP address. The default SCDA is the IP address of the network or computer to which the camera is connected. It can be set within a range so that the camera sends data as a multicast. As long as switches in the path between the sender and receivers support and are configured for multicasting, multiple receivers can listen to the data stream from the camera. Multicast addresses are between 224.0.0.0 and 239.255.255.255. For more information on multicast address assignments, see http://tools.ietf.org/html/rfc3171 SCDA can be controlled using the GevSCDA GenICam feature (page 65) or the GigE Vision bootstrap registers (page 74). 2.4.4.2 Heartbeat The heartbeat is a mandatory GigE Vision feature to monitor the connection between an application and the camera. The application must continually reset the heartbeat timer, or the camera will assume an error has occurred and shut Revised 12/13/2012 Copyright ©2012 Point Grey Research Inc. 12
Point Grey Blackfly Technical Reference 2 Blackfly Installation down the connection. In general, the FlyCapture API manages the heartbeat at a low level; however the following two features are controllable: Heartbeat Timeout and Heartbeat Disable. Heartbeat Timeout Heartbeat timeout is the time, in milliseconds, that the camera will wait between resets from the application. Heartbeat timeout can be set between 500 ms and 10 seconds. The default setting is 3000 ms (3 seconds). If there is no communication between the camera and the application for longer than the timeout value, the connection is shut down. Heartbeat timeout can be controlled using the GevHeartbeatTimeout GenICam feature (page 65) or the GigE Vision bootstrap registers (page 74) . The FlyCapture SDK also supports configuring heartbeat timeout. For more information, consult the FlyCapture SDK Help. Heartbeat Disable The heartbeat is enabled by default. Heartbeat disable allows the heartbeat function in the camera to be disabled. The heartbeat can be disabled using the GevGVCPHeartbeatDisable GenICam feature (page 65) or the GigE Vision bootstrap registers (page 74) . The FlyCapture SDK also supports configuring the heartbeat. For more information, consult the FlyCapture SDK Help. Revised 12/13/2012 Copyright ©2012 Point Grey Research Inc. 13
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