OPC-UA Reader
Read a value from a PLC node via OPC-UA protocol.
The OPC-UA Reader module reads a single value from a PLC node and stores it in the pipeline data registry. This is useful for reading process parameters, part identifiers, trigger signals or any other PLC-accessible data.
Configuration
| Field | Type | Description |
|---|---|---|
| plc_name | string |
The label of the PLC connection (configured on the Devices → PLC page) |
| plc_node | string |
The OPC UA node address, entered manually or selected with Browse |
Behavior
- Connects to the specified PLC using the configured connection.
- Reads the value of the specified node.
- Stores the value and execution time in the data registry.
Inputs & Outputs
| Direction | Key | Type | Description |
|---|---|---|---|
| Input | — | — | No inputs required |
| Output | <module_id>.value |
varies | The value read from the PLC node |
Configure the PLC connection first. Browse requires the selected PLC to be reachable; an invalid or unavailable node produces an execution error.