Fixed Point Control System, by Fixed Point Engineering Ltd, v0.1 concept

What this is

FPCS is a concept for how a small air handling unit could be supervised: the safety contacts, a start sequence, CO₂ fan speed, and supply temperature through the heating and cooling coils.

This copy runs entirely in the browser. The numbers move, and you can open a safety contact to see the fans stop. It is the screen we are trying out before a controller is built behind it.

What this is not

It is not for construction, not a panel design, and not a life-safety system. On a real air handler the fire alarm, the emergency stop, and the frost thermostat are hardwired into the fan starters. A BMS watches those contacts and repeats the stop. It does not replace the wiring.

This concept

Version

0.1 concept

Plant

AHU-01, supply and extract

Points list

56 signals, filed for the controller build

On this screen

Safety chain, air path, filter alarm, setpoints, hand/auto

Driver

In-browser simulation

Mark and colour

Taken from the Fixed Point jobs app. Navy strokes, amber centre.