Product data

Publication 1785-SG001B-EN-P - June 2006
4 Introduction
Lay Out the System
Lay out the system by determining the network configuration and the
placement of components in each location. Decide at this time whether each
location will have its own controller.
Place each controller’s I/O on an isolated network to maximize the
performance and to more easily accommodate future network or system
configuration changes. If you plan to share I/O, make sure the I/O is on a
network that each controller can access.
Assume that Network A and Network B both require a controller and its I/O.
Both controllers interact with time-critical information
.
For a PLC-5 controller to control I/O modules, both the controller and the
I/O modules must be directly attached to the same
network.
Evaluate what communications need to occur between controllers. If there is
sporadic information that is not time-critical, use a message-based network
such as an EtherNet/IP (the information portion), Data Highway Plus, or the
unscheduled portion of the ControlNet network. If the information is
time-critical, such as producer/consumer tags between controllers, use the
ControlNet or EtherNet/IP network.
I/O Location Controller in
Panel A, Chassis 1
Controller in
Panel B, Chassis 1
Panel A, chassis 1 Yes Yes
Panel A, chassis 2 Yes No
Panel A, chassis 3 Yes No
Panel B, chassis 1 Yes Yes
Panel B, chassis 2 No Yes
Panel C, chassis 1 Yes Yes
RSView
Panel C
Panel A
Chassis
Panel A
Chassis 2
Panel A
Chassis 3
Panel B
Chassis
Panel B
Chassis
Panel
View
Panel
View
Network C
Network A
Network B