Node-RED Spike Reporter Node

This is a node for Node-RED which monitors a system's state and generates alarms based on consecutive out-of-control status indications. This node accepts input from the node-red-contrib-simple-spc node.

Installation

To install this node, run the following command in your Node-RED user directory - typically ~/.node-red:

npm install node-red-contrib-spike-reporter

Usage

The Alarm node accepts a message object (msg) with a payload property (msg.payload). The payload should be an object with an outOfControl property, which is a boolean.

The node will track the outOfControl status in a moving window of messages. When the window fills up, the node will evaluate the window:

• If all of the outOfControl values are true, the node will generate an alarm message, and update its status to "Alarm: Out of Control".
• If some but not all of the outOfControl values are true, the node will generate a spike message, and update its status to "Spike detected".
• If none of the outOfControl values are true, the node will maintain a normal status.

The node's status will also update if the message object does not have the expected outOfControl property, or if there's an error in the node.

Configuration

• Message Window Size: The size of the message window can be configured using the messageWindowSize property in the node configuration. By default, the size is set to 5.

Contributing

Pull requests are welcome. For major changes, please open an issue first to discuss what you would like to change.

License

This project is licensed under the GPL-3.0 License.