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ControlLogix EtherNet/IP master
This plugin reads and writes Allen-Bradley ControlLogix controllers by EtherNet/IP tag name. It is named ControlLogixMaster in the device selector.
See Collection Configuration for common channel, device, variable, and data-format settings. This page covers only ControlLogix routing, tag addresses, and debug.
Open the plugin
Open Development Configuration → Collection Configuration, create a TCP client channel, then create a device using ControlLogixMaster.
Supported scope
| Item | Description |
|---|---|
| Channel | TCP client. |
| Address | Controller tag name. |
| Data types | Boolean, Byte, common signed/unsigned integers, Float, Double, and String. Complete UDTs, STRING arrays, TIME, and Decimal require separate controller-specific verification. |
Plugin properties
| Setting | Default | Description |
|---|---|---|
| Target slot | 0 | Slot containing the CPU module in the ControlLogix chassis. |
| Backplane port | 1 | Backplane port or path segment used to reach the CPU. |
For a CPU in a chassis, the slot must match its installed location. Configure CompactLogix or other routing layouts according to the actual controller path.
Address rules
Enter the full controller tag name, for example TankLevel. The tag name, case, array index, and program scope must match the PLC project. Configure the variable’s common Array Length for arrays.
Special methods
This plugin has no additional special methods. Variables use tag names directly.
Device debug
Open Development Configuration → Collection Configuration, select the ControlLogix device, then open Protocol Debug at the top of the workspace. Select Operations to browse the controller’s tag directory.
| Feature | Purpose |
|---|---|
| Operations | Refresh, filter, page, export, and import the controller’s readable tags. |
| Channel Log / Device Log | Inspect session establishment, CIP requests, responses, and connection errors from the workspace tabs. |
Browse, export, and import tags
Click Refresh to load global and Program Scope tags. Filter by tag or structure name, check the reported type and array dimensions, and select the required tags. Export uses the selected tags, or all importable tags matching the current filter when no rows are selected. Import shows conflicts before confirmation and requires write permission.
Functions
| Function | Purpose |
|---|---|
| Read and write | Read a confirmed point and write only to an approved test point. |
| Channel Log / Device Log | View session, protocol status, and error details. |
Verify the configuration
- Read one known scalar tag and verify its value and data type.
- Confirm session creation and a valid response in Channel Log or Device Log.
- Then verify array or string tags. Write only to an approved test tag.
Troubleshooting
| Symptom | Check |
|---|---|
| Session cannot be established | Controller IP, network, EtherNet/IP service, and existing connection ownership. |
| Route fails | Target slot, backplane port, and actual chassis layout. |
| Tag is not found | Tag name, case, program scope, and array index. |
| Value is incorrect | Data type, array length, and actual PLC tag type. |
| Write fails | Controller mode, tag permission, variable permission, and field interlock. |
Related links
- Collection Configuration: Common channels, devices, variables, and data format.
- Plugin Manual Index: Other collection and data-forwarding plugins.