Rockwell Automation Publication 5000-UM005B-EN-P - November 2015 17
Analog I/O Module Operation in a Logix5000 Control System Chapter 1
Controller to Input Module Data Transmission
The following events occur when the controller sends data to the input module.
1. One of the following:
• If the controller is directly connected to the EtherNet/IP network, it
broadcasts the data to the network.
In this case, proceed to
step 3.
• If the controller is connected to the EtherNet/IP network via a
communication module, the controller transmits the data to its
backplane.
In this case, continue at
step 2.
2. The EtherNet/IP communication module transmits the data to the
EtherNet/IP network.
3. After receiving data from the network, the 5069-AEN2TR EtherNet/IP
adapter in the 5069 Compact I/O system receives the data from the
network and transmits it to the 5069 Compact I/O system backplane.
4. The 5069 Compact I/O analog input module receives the data from the
backplane and behaves as dictated by its configuration.
Output Module Operation
The controller sends data to an output module at the RPI or after an Immediate
Output (IOT) instruction is executed.
The RPI defines when the controller sends data to the 5069 Compact I/O analog
output module and when the output module echoes data. The controller sends
data to an output module only at the RPI.
At the RPI, not only does the controller send data to the output module, but also
the output module sends data to the controller. For example, the output module
sends an indication of the channel data quality.
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