990XCP98000 SQUARE D, 990XCP98000 Datasheet - Page 251
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990XCP98000
Manufacturer Part Number
990XCP98000
Description
QUANTUM CPU BATTERY FOR S
Manufacturer
SQUARE D
Datasheet
1.990XCP98000.pdf
(463 pages)
Specifications of 990XCP98000
Rohs Compliant
YES
Battery Capacity
1800mAh
Battery Technology
Lithium
Battery Voltage
3V
Battery Terminals
Connector
Weight
0.12lb
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Performance
(continued)
Modicon
automation platform
System approach
Ethernet TCP/IP network performance
The third step is used to calculate the total traffic of the various collision domains.
For each domain, it is necessary to add the “internal” collision domain traffic to the
traffic with the other collision domains.
The following rules apply when calculating the traffic for a domain:
b
calculation.
b
is included in the traffic calculation.
Note: In the calculations, the principle is that multicast filtering is activated at the switches so that
the Global Data traffic is propagated at collision domain level when a station belongs to the
Global Data group.
The aim of the fourth step is to compare the traffic load of each collision domain with
the bandwidth of the Ethernet network (10 Mbps, 100 Mbps, etc.). The user must
ensure that the application load does not exceed the network capacity in terms of
usable bandwidth. Usable bandwidth in an automation network is evaluated using a
percentage of the hypothetical network capacity. This percentage varies according
to the industrial Ethernet standard used. The permitted bandwidth lies between
30 and 40% of the total theoretical bandwidth and varies according to the topology
used.
If the application load exceeds the usable bandwidth, it must be reduced. To do this,
add switches to reduce the number of stations in the overloaded collision domain
(and therefore the internal domain traffic) and/or the industrial Ethernet standard
used must be optimized.
Evaluating the network load
System evaluation
When a station belongs to the domain, the traffic it initiates is included in the traffic
When the station does not belong to the domain, only the traffic sent to the domain
®
(continued)
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(continued)
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