User guide

Introduction
14
840 USE 115 00 Version 1.0
Segregating
Traffic
The best method to protect Quantum Automation traffic from information s
y
stems
traffic is to provide a completel
y
separate ph
y
sical network for automation control.
Another method is to use readil
y
available Ethernet devices such as brid
g
es and
routers to lo
g
icall
y
se
g
ment the network, isolatin
g
office traffic from control data.
Minimizing
Delays
Components such as repeaters, brid
g
es, routers and hubs take a finite time to
process each messa
g
e. If messa
g
es pass throu
g
h man
y
of these devices,
processin
g
dela
y
s will accumulate. Dela
y
times are available from device
manufacturers. Check with
y
our network administrator to
q
uantif
y
the effect on
control messa
g
es and to determine whether it will be si
g
nificant for
y
our
application.
Using Switches
Ethernet switches can be used to ensure hi
g
her network performance. These
newer devices allow each connection to have access to the full 10 Mbps bandwith
instead of havin
g
to share the bandwith with all other nodes. The
y
reduce the
timin
g
problems associated with Ethernet collisions and the resultin
g
“back off”
transmission dela
y
s. Check with
y
our network administrator to see if
y
our
application would benefit from switchin
g
Ethernet devices.