
5 Configuring BlackflyS Setup
nDynamic (DHCP)—The camera is set to automatically obtain an IP address. This means that the IP address may
change (within a range) every time the camera or computer is restarted. It may take up to one minute for the IP
address to resolve and the camera to enumerate.
nDefault (LLA)—The camera uses an IP address from the link-local address block 169.254.x.x.
The camera assigns its current IP address in the following sequence:
1. Persistent—Uses the defined IP address. If not available, then;
2. DHCP—Attempts to find a dynamic IP address. If not available, then;
3. LLA—Uses an LLA IP address.
SpinView can automatically force an IP address refresh. This detects the IP address of the Network Interface card and
automatically sets the camera’s IP address relative to the card.
To open SpinView:
Start Menu ÒAll Programs ÒSpinnaker SDK ÒSpinView
5.3 Allocating Bandwidth—GigE
The User Datagram Protocol (UDP) used by the GigE Vision standard provides no guaranteed transmission or fixed
timing mechanism. Therefore, bandwidth must be managed by the Device Throughput Limit, based on desired
resolution and frame rate.
5.3.1 Determining Bandwidth Requirements
The maximum bandwidth available is 125 MB/s. This includes image data, control data and image resends, which occur
when frames are being dropped. Each image and each packet has a certain amount of overhead that will use some
bandwidth. Therefore, when calculating your bandwidth requirements, you should not attempt to use the full
maximum of 125 MB/s.
To calculate your bandwidth requirements:
Determine your required resolution, frame rate, and pixel format (bytes per pixel)
(Height x Width x Frame Rate x Bytes per Pixel)/1000000 = Bandwidth in MB/s
For example, for an image that is VGA, 82 FPS, Mono8:
640 (H) x 480 (W) x 82 (FPS) x 1 (BPP) = ~25 MB/s
Once you have calculated your required bandwidth, you can allocate an amount to each camera by adjusting the Device
Throughput Limit. Allocating a specific amount to each camera helps to avoid dropped packets due to a data burst. You
would do this in a set up with multiple cameras, or in a situation where the system bandwidth might be limited or
shared due to hardware architecture.
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.
2/14/2023
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Teledyne FLIR Blackfly®S Installation Guide 12