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Dynamic (DHCP)—The camera is set to automatically obtain an IP address. This means that the IP
n
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.
Default (LLA)—The camera uses an IP address from the link-local address block 169.254.x.x.
n
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 > All Programs > Point Grey Spinnaker SDK > SpinView
5.3
Allocating Bandwidth—GigE only
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)
For example, for an image that is VGA, 82 FPS, Mono8:
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.
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.
5/4/2017
©2015-2017 FLIR
Integrated Imaging
Solutions Inc.
All rights reserved.
(Height x Width x Frame Rate x Bytes per Pixel)/1000000 = Bandwidth in MB/s
640 (H) x 480 (W) x 82 (FPS) x 1 (BPP) = ~25 MB/s
FLIR Blackfly
5 Configuring Blackfly S Setup
®
S Installation Guide
12
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