Industrial companies mostly take good care of their basic activities-production of products, but minimize the services that are not directly in the function of production, which are consequently reduced considerably. Thus the significance of the energy system fot the primyry production process often becomes obvious to us only when the disturbances in energy supply occur. Great production failures and poor product quality can be connected with this. We can hardly imagine qualitaty management and control of a facility internal energy system without a computer management and control system (CNS). It enables system management with a smaller team and quicker response to disturbances.