Introduction

Segregating

The best method to protect Quantum Automation traffic from information systems

Traffic

traffic is to provide a completely separate physical network for automation control.

 

Another method is to use readily available Ethernet devices such as bridges and

 

routers to logically segment the network, isolating office traffic from control data.

Minimizing

Components such as repeaters, bridges, routers and hubs take a finite time to

Delays

process each message. If messages pass through many of these devices,

 

processing delays will accumulate. Delay times are available from device

 

manufacturers. Check with your network administrator to quantify the effect on

 

control messages and to determine whether it will be significant for your

 

application.

Using Switches

Ethernet switches can be used to ensure higher network performance. These

 

newer devices allow each connection to have access to the full 10 Mbps bandwith

 

instead of having to share the bandwith with all other nodes. They reduce the

 

timing problems associated with Ethernet collisions and the resulting “back off”

 

transmission delays. Check with your network administrator to see if your

 

application would benefit from switching Ethernet devices.

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Schneider Optics Modicon Quantum Ethernet manual Segregating, Traffic, Minimizing, Delays, Using Switches