Modern automation has several brains — and each has its own idea about energy

A modern art gallery on the screens

In most of the large buildings, factories and other facilities I walk into, the screens show a small gallery of modern art: BMS here, SCADA there, HVAC controllers from a different manufacturer next to them, then a standalone lighting control system, and sometimes a battery storage unit with its own EMS controller that was supposed to "tie it all together".

It sounds impressive. Almost like NASA mission control. After a moment, though, a simple question comes up: does it actually work?

Every one of these systems is marketed today as an "energy management tool". Each has its own panel, its own charts, its own alarms and its own sense of purpose. Each is usually configured correctly within its own domain. The documentation adds up. You could frame the handover certificate.

And the facility — from an energy cost point of view — performs like an orchestra in which every musician is reading from sheet music, unfortunately from different pieces.

Each of them is right on its own. Together they create chaos

Why? Because none of these systems fully sees what the others are doing. One adds heat to a zone that another is about to start cooling. The lighting controls dim a room that SCADA is only just recognising as unoccupied. The EMS shifts grid draw without knowing that the BMS has just called for a pump with a higher process priority.

Each of them is right on its own. Together they produce something closer to a meeting with no chair than to intelligent control.

And here comes the temptation: let us add another layer, one more system, one more "brain". Preferably with nice charts. Except that adding another brain to an organism that already does not know which one to obey rarely improves coordination.

What is missing is not a system, but a hierarchy of goals

The problem is not that there is too little automation — increasingly there is too much. Something else is missing: an agreed hierarchy of goals.

Who has priority? Comfort or savings? The production process or the demand balance? Emissions or the price of energy in this particular fifteen-minute interval? The battery or the HVAC? The EMS or the BMS?

These are not academic questions. They are decisions that happen every day in an automated facility — only nobody has consciously designed them. Which is why a more important question than "which system should we install next?" is this one: who will design the supervisory logic in which the existing systems stop pulling in their own directions?

Intelligence starts with priorities

"Intelligent control" only begins once we understand what takes precedence over what. Without that, we do not have intelligence — we have a very expensive argument between several control systems, which the operator tries to referee by hand every day. The result: bills that keep climbing.