Rockwell ControlLogix

Estimated reading time: 2 minutes

Refer to these sections for details:

Supported Series

Rockwell Automation Allen-Bradley ControlLogix, CompactLogix, FlexLogix Ethernet, CompactLogix 1768-L43 1768-L45 with 1768-ENBT/A Ethernet module. 


Certain device drivers will not have a list of register names in the DeviceHub Add Tag form. These are Free Tag PLCs. For Free Tag requirements, see Troubleshoot Device Connectivity Status.

PLC Connection Settings

Parameters Recommended Options Notes
PLC Type Rockwell EtherNet/IP (ControlLogix)
PLC Interface Ethernet

Port # 44818

PLC Station # Same as CPU Slot #

PLC Configuration

The setup shown here is for the Rockwell Automation Allen-Bradley ControlLogix PLC.

The instructions listed here provide only the basic configuration steps. Refer to the Rockwell Automation Allen-Bradley PLC documentation for current, complete details.

  1. Set the PLC IP address.
  2. Create new tags (Controller and Program tags supported).
  3. Export tag data to a CSV file: Tools > Export > Tags and Logic Comments.
    Note: The separator in the CSV file must be a comma.
  4. Open the OTLink, select the driver and set the IP address.
  5. Click DataType to open the Structure Editor to edit the data type of the tags and edit the data type of the ProgramTag
  6. In System Parameter Settings, click Import Tag and select the CSV file.
  7. In the Object dialog, select PLC Tag Address.

OT Link Platform DeviceHub Configuration

To configure DeviceHub for this ControlLogix PLC:

  1. DeviceHub > Add Device
    Type: Allen-Bradley
    Driver: AB ControlLogix

  2. Enter details specific to your environment and click Add Device.

Device Addresses

PLC Data Type


Data Format




Bit object





16-bit signed, ASCII

-32768 ~ 32767


Double Integer

32-bit signed

-231 ~ (231 - 1)


Single Precision Float

32-bit Float

IEEE 754