node-red-contrib-piwebapi 3.10.0
Node-RED nodes for OSIsoft PI Web API with OMF support and real-time subscriptions
node-red-contrib-piwebapi
Node-RED nodes for OSIsoft PI Web API with OMF support and real-time subscriptions.
Installation
npm install node-red-contrib-piwebapi
Or install via the Node-RED palette manager.
Nodes
| Node | Description |
|---|---|
| PI Web API Config | Connection settings (URL, credentials, SSL) |
| PI Point List | List PI Points by name pattern, store in global context |
| PI Point Read | Read current, recorded, interpolated, or plot values |
| Asset Read | Read AF element attribute values |
| Attribute List | List AF element attributes |
| Write | Write values to PI Points (numeric, digital state, system state) |
| OMF Writer | Send OMF type, container, and data messages |
| Subscribe | WebSocket subscription to PI Point value changes |
| Event Frame Add | Create event frames |
| Event Frame Get | Retrieve event frames |
| Message Serializer | Serialize messages for batch processing |
Quick Start
Read a PI Point value
[Inject] → [PI Point Read] → [Debug]
Write to a PI Point
[Inject] → [Function: Set Value] → [Write] → [Debug]
OMF workflow (create new stream)
[Inject] → [OMF Type Builder] → [OMF Writer] → [Debug]
[Inject] → [OMF Container Builder] → [OMF Writer] → [Debug]
[Inject] → [Function: Build Data] → [OMF Writer] → [Debug]
PI Web API Configuration
For OMF support, configure these in PI Web API Admin:
| Setting | Value |
|---|---|
| CorsMethods | GET,OPTIONS,POST,PUT |
| DisableWrites | False |
| OmfCreateMode | Insert |
If EnableCSRFDefense is True, the nodes automatically include the X-Requested-With: XMLHttpRequest header.
License
MIT
Author
Holger Amort
