Installation guide

Estimating Network Performance

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Note that the network’s capacity is 20,000 registers/s. The throughput

for any node is 20,000 registers/s divided by the count of nodes on the

network.

3.14.1 Grouping Nodes Logically for Increased Throughput

Each node’s throughput is a factor of the network’s node count and

network loading, as shown in Figure 37. Consider how your node

devices must communicate to the other nodes. Plan each network in

your application as an integrated system of devices and application

programs that will achieve the required throughput.

Instead of constructing a single network with a large node count, you

can realize improved throughput by integrating smaller, more compact

networks through bridges. Note that you can include two or more

bridges on the same network as a way to pass data quickly to multiple

remote networks. Allow margins for instantaneous loading.

Compact networks should consist of nodes that need to communicate

time-critical information with one another. Bridges serve to pass any

lower-priority information to devices on remote networks. Using

bridges in an application in which all nodes must communicate

timecritical information will not improve throughput. When you plan

your application, consider the communication requirements between

each pair of devices. Prioritize the communication requirements so

that you can determine the best grouping of nodes. This will also assist

you later when you construct MSTR functions in your application

program.