Allen-Bradley tank monitoring in Coreflux LoT

How it works

This Coreflux LoT template reads a live Allen-Bradley CompactLogix tank and republishes process values, metadata, and derived topics under demo/tankwatch/#. It turns four raw alarm bits into a single state word, builds a 1-minute level trend, and emits a snapshot report every 15 seconds.

Key features

• PLC polling: Reads Tank.Level.Value, Tank.Temperature.Value, alarm bits, and metadata from one ALLEN_BRADLEY route.
• Derived alarm state: Collapses highhigh, high, low, and lowlow bits into one consumable topic per signal.
• 1-minute trend: Keeps count, sum, min, and max, then publishes a closed-window trend model.
• Snapshot report: Publishes level, temperature, states, and PLC description as collapsed JSON.
• Self-contained demo: Uses one route, four actions, and two models; no external APIs required.

Prerequisites

• Coreflux broker build with the ALLEN_BRADLEY native dependency
• Network access to the target PLC
• A controller address and tag paths adapted to your own site