Installation guide

88 Estimating Network Performance
890 USE 100 00
3.14 Estimating Throughput (W ith MSTR)
Figure 37 shows a graph of the throughput per node as a function of
the node count. The data rate is the quantity of registers that can be
transferred per second of time. The graph was constructed with a
network containing Modicon programmable controllers, with each
controller’s message loading at maximum (each controller has all four
MSTR Data Master paths on, with each path passing 100 registers).
Registers/s
Nodes
5K
10K
15K
20K
5 10 15 20 25 30
Node Throughput
Loading
No Global Data
4 Data Master Paths Always ON (100 Registers) in Each Node
Total Network Throughput = 20K Registers/s
Throughput/Node =
20K Registers/s
Number Of Nodes
2 3 4
No Queueing Or Programming on Network
Figure 37 Node Throughput
The throughput shown in the figure is for data transactions, with no
global data, no queueing at destinations, and with no remote
programming concurrently in progress.