Connecting to CompactLogix
note
This driver supports CompactLogix firmware up to version 20.18.
Connect to a CompactLogix Device
This driver requires the OPC UA module to be installed and enabled. If the module is missing or disabled, the device will fault with a “Missing Dependency” error on the Platform System > Modules page.
On the Gateway, go to Connections > Devices > Connections.
Click Create Device Connection +.
Select Allen-Bradley CompactLogix (Legacy) from the list and click Next.
On the Configure Device screen, enter the required fields:
- Name: The desired name for the device (e.g., CompactLogix)
- Hostname: The IP address of the PLC (e.g., 10.20.4.55)
Click Create Device Connection.
The device will be listed now on the Connections page. The status will initially show Disconnected, but will move to a Connected state.
Device Connection Settings
General
| Name | Description |
|---|---|
| Name | A user-defined name for the device. This name appears in OPC item paths and the Devices list. Name must begin with an underscore or a letter, and cannot include special characters. |
| Description | An optional description for the device. |
| Enabled | Enables or disables the device connection. Only enabled devices are accessible in the system. |
Connectivity
| Name | Description |
|---|---|
| Hostname | IP address of the target device or Ethernet module (such as ENBT or EN2T). |
| Local Address | IP address of the local interface to use when connecting. Leave blank to auto-select. |
| Timeout | Connection timeout in milliseconds. |
| Connection Path | Used to define the route to the processor. The Connection Path format contains four comma separated numbers. The first number is always 1 and tells the Ethernet module to route through the backplane. The rest of the numbers vary by device type. See Allen-Bradley Connection Paths for more information. |
Advanced
| Name | Description |
|---|---|
| Disable Automatic Browse | Disables automatic browsing of the tag structure. |
| Show String Arrays | Enables visibility of string arrays in the address space. |
| Status Request Poll Rate | Interval in milliseconds for polling the device status. |
| Max Concurrent Requests | Number of simultaneous requests allowed. Larger values may improve performance but can overwhelm the device. |