What This Appendix Contains; How The Controllogix System Uses Connections - Allen-Bradley ControlLogix User Manual

What This Appendix Contains

How the ControlLogix System
Uses Connections
Allocating Communication Connections
This appendix describes how to determine the connection requirements for
a ControlLogix system.
For information about

How the ControlLogix system uses connections

Determining I/O connection requirements
Determining connections for produced and
consumed tags
Determining connections for messaging
Determining total connection requirements
The ControlLogix system uses a connection to establish a communication
link between two devices. This includes Logix5550 controllers,
communication modules, input/output modules, produced/consumed tags,
and messages. Connections take many forms:
Logix5550 controller direct to local I/O or local communication module
Logix5550 controller direct to remote I/O or remote communication
module
Logix5550 controller to remote chassis (rack optimized)
produced and consumed tags
messaging, including block-transfers
You indirectly determine the number of connections that the Logix5550
controller requires by configuring the controller to communicate with other
devices in the system.
Each module in the ControlLogix system supports a limited number of
active connections. Take these connection limits into account when
designing your system.
Appendix
See page
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