Connecting to MicroLogix
This driver supports direct communication with MicroLogix 1100 and 1400 devices. Limited support is available for the 1200 and 1500 series.
Connect to a MicroLogix 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 MicroLogix and click Next.
On the Configure Device screen, enter the required fields:
- Name: MicroLogix
- Hostname: The IP address of the device (e.g., 10.20.7.77)
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 | Optional description to help identify the device. |
| Enabled | When selected, the device is active and available for use. |
Connectivity
| Name | Description |
|---|---|
| Hostname | The Hostname value is the IP Address of the MicroLogix 1100 processor, MicroLogix 1400 processor or 1761-NET-ENI Ethernet interface. EthernetIP protocol on TCP port 44818 (0xAF12) is used to communicate to the listed devices. |
| Local Address | The local address to connect from when establishing a TCP connection. If left blank, then the driver will select an available address. |
| Timeout | The maximum amount of time to wait, in milliseconds, for responses from the processor. |
| Connection Path | The connection path to the processor. If specified, the slot number setting is ignored, so be sure to terminate the path with backplane and slot number. [Optional] |
Advanced
| Name | Description |
|---|---|
| Disable Processor Browse | Disables processor browse setting. May be required for some MicroLogix 1200 or 1500 devices. |
| Zero TNS Connection | Disables the Zero TNS connection setting. |
| Browse Cache Timeout | The amount of time, in milliseconds, to cache tag structure results read from the device. |
Supported Connection Methods
This driver supports:
- MicroLogix 1100 and 1400 direct over Ethernet/IP
- MicroLogix 1100 and 1400 through a 1761-NET-ENI Ethernet interface
- MicroLogix 1100 and 1400 through a Spectrum Controls WebPort 500
MicroLogix 1200 and 1500 are not fully supported. These devices do not support tag browsing, so Disable Processor Browse must be enabled. Additionally, the MicroLogix driver does not support access to Input Parameters.
If a MicroLogix device becomes stuck in a "Browse Pending" state, try setting the Connection Path property to 1,0 to force routing through backplane slot 0.