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Rockwell Automation Publication 5069-UM004A-EN-P - April 2019
Chapter 1
Digital Module Operation in a Control System
• The controllers that do maintain, but do not ‘own’, the module
configuration are similar to Listen-only controllers.
The difference between the controllers is that the controllers that
maintain, but do not own, the module configuration can use a Multicast
or Unicast connection over the EtherNet/IP network.
For more information on Listen-only controllers, see
.
Configuration Changes in an
Input Module with
Multiple Owners
You must be careful when changing the configuration data of an input module
in a multiple-owner scenario. If the configuration data is changed in owner A
and sent to the module, the changed configuration data is accepted as the new
configuration for the module. Owner B continues to listen unaware that any
changes have been made in the behavior of the input module, as illustrated.
Figure 6 - Module Configuration Changes with Multiple Owners
DC INPUT
5069-IB16
DC OUTPUT
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ANALOG INPUT
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ANALOG OUTPUT
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COUNTER
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SA P
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MOD P
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Compact 5000™ I/O
SA P
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MOD P
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DC INPUT
5069-IB16
DC OUTPUT
5069-OB16
DC INPUT
5069-IB16
DC OUTPUT
5069-OB16
DC INPUT
5069-IB16
DC OUTPUT
5069-OB16
ANALOG INPUT
5069-IY4
ANALOG OUTPUT
5069-OF8
COUNTER
5069-HSC2xOB4
SA P
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MOD P
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Controller A sends new configuration to the module.
Controller B is unaware of any configuration changes.
IMPORTANT
A message in Logix Designer application alerts you to the possibility of a
multiple owner-controller situation and lets you inhibit the connection
before changing the module configuration. When changing the
configuration for a module with multiple owners, we recommend that you
inhibit the connection.