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Baumer EXG03 User Manual

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28
Example1:MultiCameraOperation–MinimalIPG5.3.1.
Setting the IPG to minimum means every image is transfered at maximum speed. Even 
by using a frame rate of 1 fps this results in full load on the network. Such "bursts" can 
lead to an overload of several network components and a loss of packets. This can occur, 
especially when using several cameras.
In the case of two cameras sending images at the same time, this would theoretically oc-
cur at a transfer rate of 2 Gbits/sec. The switch has to buffer this data and transfer it at a 
speed of 1 Gbit/sec afterwards. Depending on the internal buffer of the switch, this oper-
ates without any problems up to n cameras (n ≥ 1). More cameras would lead to a loss of 
packets. These lost packets can however be saved by employing an appropriate resend 
mechanism, but this leads to additional load on the network components
Example2:MultiCameraOperation–OptimalIPG5.3.2.
A better method is to increase the IPG to a size of
optimal IPG = packet size + 2 × minimal IPG
In this way both data packets can be transferred successively (zipper principle), and the 
switch does not need to buffer the packets
Figure35▲
Operation of two camer-
as employing a Gigabit 
Ethernet switch.
Data  processing  within 
the  switch  is  displayed 
in the next two gures.
Figure36►
Operation  of  two  cam-
eras employing a
minimal  inter  packet 
gap
(IPG).
Figure37►
Operation of two camer-
as employing an optimal 
inter packet gap (IPG).
Max.IPG:
On the Gigabit Ethernet
the max. IPG and the data
packet must not exceed 1
Gbit. Otherwise data pack-
ets can be lost.

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Baumer EXG03 Specifications

General IconGeneral
BrandBaumer
ModelEXG03
CategorySecurity Camera
LanguageEnglish

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