System Performance

Introduction

Creating a RIO system requires the use of network components and designs that support switched Ethernet communication including:

full duplex transmissions
100 Mbps transmission speed
QoS prioritization of RIO packets

This chapter introduces you to devices that meet these performance considerations. It also presents typical system recovery times and describes methods to help improve system performance.

What Is in This Section?

This section contains the following topics:

System Performance
System Throughput Considerations
Calculating the Minimum MAST Cycle Time

determinism

For a defined application and architecture, you can predict that the delay between an event (change of value of an input) and the corresponding change of a controller output is a finite time t, smaller than the deadline required by your process.

QoS

(quality of service) The practice of assigning different priorities to traffic types for the purpose of regulating data flow on the network. In an industrial network, QoS is used to provide a predictable level of network performance.