node-red-contrib-operating-hours

Counts operating hours and starts of a device. Triggers a maintenance alarm when the configured service interval is reached.

Install

npm install node-red-contrib-operating-hours

Usage

Send true (running) or false (stopped) as msg.payload.

| msg | Effect | |-----|--------| | msg.payload = true | Device running, time accumulates | | msg.payload = false | Device stopped, time pauses | | msg.reset = true | Reset all counters | | msg.resetService = true | Reset service alarm only |

Output 1 — Status

{
  "running": true,
  "runtimeHours": 523.45,
  "starts": 142,
  "serviceInterval": 1000,
  "serviceHoursRemaining": 476.55,
  "serviceDue": false,
  "lastStart": "2026-03-01T08:00:00Z",
  "lastStop": null
}

Output 2 — Service Alarm

msg.payload = true when service is due.

License

MIT — sr.rpo