Rockwell Automation Publication 5094-UM001C-EN-P - April 2019 23
Digital I/O Module Operation in a Logix 5000 Control System Chapter 1
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, that 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 5 - Module Configuration Changes with Multiple Owners
To prevent other owner-controllers from receiving potentially erroneous data, use
these steps when changing the configuration of a module in a multiple owner
scenario while online.
1. For each owner-controller, inhibit the connection to the module either in
the software on the Connection tab or the message dialog box warning you
of the multiple owner condition.
2. Make the appropriate configuration data changes in the software. For more
information about using Logix Designer to change the configuration, see
Chapter 6
.
3. Repeat step 1
and step 2 for all owner-controllers, making the exact same
changes in each.
4. Clear the Inhibit checkbox in each owner-controller configuration.
STATUS
NET
LINK 1
LINK 2
5094-AENTR
EtherNet/IP
™
Adapter
FLEX 5000
TM
I/O
PRP
DLR
POWER
X100
X10
X1
IP ADDRESS
STATUS
POWER
DIGITAL 16 INPUT 24 VDC
5094-IB16
1
1
TB3
FLEX 5000
TM
I/O
0 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15
Controller A sends new configuration to the module. Controller B is unaware of any configuration changes.
IMPORTANT A message in Logix Designer 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.
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