Efficiency chart card with background

Who it’s for

Plant operators, maintenance engineers, and energy managers ask “can I see efficiency trend and performance status at a glance?” The background variant combines a trend chart with a full-card color signal for wall-mounted control room displays.

What it does

A device reporting efficiency = 75% renders a time-series trend line, the current value, and delta figures on a card whose entire background fills with the performance color: red for Low (below 40%), orange for Moderate (40–60%), green for Good (60–80%), and blue for Excellent (above 80%).

• Full-card background color makes efficiency performance level readable across a room without reading the number
• Time-series trend chart shows whether efficiency is stable, rising, or declining
• Delta percentage and absolute delta quantify how much efficiency has changed from the previous period
• Shows one asset’s data per widget; add multiple widgets to monitor different machines side by side

How to set up

Data keys

Key	Role	Type	Description
efficiency	Chart series	Timeseries	Efficiency percentage (0–100); change the key name to match your device’s telemetry key
Latest	Latest value	Timeseries	The headline figure above the chart. Its own color ranges are where the band colors are edited
Delta percent	Percentage change	Timeseries	Change against the previous period, as a percentage
Delta absolute	Absolute change	Timeseries	Change against the previous period, in the key’s own unit

The widget ships with a simulated function datasource key labeled Efficiency, so it draws random values until you point the datasource at a device and rename the key.

To point it at your own device: open the dashboard in edit mode, open the widget’s Datasources, pick the entity or entity alias, and replace the function key with the key your device reports.

Value ranges

Range	Level	Color
0–40	Low	Red
40–60	Moderate	Orange
60–80	Good	Green
80+	Excellent	Blue

How to customize

• To change the performance thresholds — edit the color ranges on the Latest data key.
• To change the background colors — edit the color of each range on the Latest data key.
• To rename the units label — change the Units field in the widget settings if needed.

Tips

• On a control room wall display, the colored background announces the current performance status from across the room while the trend chart shows whether efficiency is stable or moving toward a different band.
• Use this card when you need both a trend signal and at-a-glance status in a visually prominent format — for example, one card per production line on a plant-floor overview screen.
• Use consistent performance colors across all efficiency widgets.