Basler raL2048-48gm Manuel d'utilisateur télécharger pdf (Page 51)

AW00118302000 Network Related Camera Parameters and Managing Bandwidth

Basler racer GigE 41

Step 2 - Set the Packet Size parameter on each camera as large as possible.

Using the largest possible packet size has two advantages, it increases the efficiency of network

transmissions between the camera and the PC and it reduces the time required by the PC to

process incoming packets. The largest packet size setting that you can use with your camera is

determined by the largest packet size that can be handled by your network. The size of the packets

that can be handled by the network depends on the capabilities and settings of the network adapter

you are using and on capabilities of the network switch you are using.

Start by checking the documentation for your adapter to determine the maximum packet size

(sometimes called “frame” size) that the adapter can handle. Many adapters can handle what is

known as “jumbo packets” or "jumbo frames". These are packets with a 16 kB size. Once you have

determined the maximum size packets the adapter can handle, make sure that the adapter is set

to use the maximum packet size.

Next, check the documentation for your network switch and determine the maximum packet size

that it can handle. If there are any settings available for the switch, make sure that the switch is set

for the largest packet size possible.

Now that you have set the adapter and switch, you can determine the largest packet size the

network can handle. The device with the smallest maximum packet size determines the maximum

allowed packet size for the network. For example, if the adapter can handle 16 kB packets and the

switch can handle 8 kB packets, then the maximum for the network is 8 kB packets.

Once you have determined the maximum packet size for your network, set the value of the Packet

Size parameter on each camera to this value.

Tip

The manufacturer’s documentation sometimes makes it difficult to determine

the maximum packet size for a device, especially network switches. There is

a "quick and dirty" way to check the maximum packet size for your network

with its current configuration:

1. Open the pylon Viewer, select a camera, and set the Packet Size param-

eter to a low value (1 kB for example).

2. Use the Continuous Shot mode to acquire several frames.

3. Gradually increase the value of the Packet Size parameter and acquire a

few frames after each size change.

4. When your Packet Size setting exceeds the packet size that the network

can handle, the pylon Viewer will lose the ability to acquire frames. (When

you use Continuous Shot, the Viewer’s status bar will indicate that it is

acquiring frames, but the frame in the viewing area will appear to be

frozen.)

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Basler raL2048-48gm Manuel d'utilisateur Page 51