A device-system comprises parallel operating devices (105-107) for driving an operating quantity towards a target value, and a control system for controlling each device at least partly based on a device-specific integral term relating to a time integral of a device-specific error signal that is indicative of a deviation of the operating quantity from the target value. The control system comprises a stabilizing system that computes an arithmetic average of the device-specific integral terms and corrects the device-specific integral terms towards the computed arithmetic average. The correction of the device-specific integral terms makes it possible to avoid unwanted drifts in the device-specific integral terms in a situation where there are differences between the device-specific error signals. The devices can be peers to each other and thus redundancy is achieved because one device can be removed from or added to the device-system without actions from the other devices.

An optimal energy management method and a system that implements the method for a nearly zero energy building (nZEB) based on the genetic algorithm technique that can provide an optimal balance between the objectives of energy saving, comfort of the building residents and maximum exploitation of the generated electric energy by the renewable energy sources through the proper utilization of a battery storage system, is developed in this invention. The above can be attained by minimizing a cost function that considers the real-time electricity price, the generated/consumed electric energy by each device, the user preferences, the state-of-charge and the energy price of the battery storage system (BSS), and the weather forecast. the system that implements the optimal energy management method comprises energy and temperature sensors, controllable power switches, a battery storage system and a controller with human machine interface. The outcomes of the energy management system are control signals that regulate the operation of the power switches and the inverter of the battery storage system.

A device-system comprises parallel operating devices (105-107) for driving an operating quantity towards a target value, and a control system for controlling each device at least partly based on a device-specific integral term relating to a time integral of a device-specific error signal that is indicative of a deviation of the operating quantity from the target value. The control system comprises a stabilizing system that computes an arithmetic average of the device-specific integral terms and corrects the device-specific integral terms towards the computed arithmetic average. The correction of the device-specific integral terms makes it possible to avoid unwanted drifts in the device-specific integral terms in a situation where there are differences between the device-specific error signals. The devices can be peers to each other and thus redundancy is achieved because one device can be removed from or added to the device-system without actions from the other devices.

An optimal energy management method and a system that implements the method for a nearly zero energy building (nZEB) based on the genetic algorithm technique that can provide an optimal balance between the objectives of energy saving, comfort of the building residents and maximum exploitation of the generated electric energy by the renewable energy sources through the proper utilization of a battery storage system, is developed in this invention. The above can be attained by minimizing a cost function that considers the real-time electricity price, the generated/consumed electric energy by each device, the user preferences, the state-of-charge and the energy price of the battery storage system (BSS), and the weather forecast. the system that implements the optimal energy management method comprises energy and temperature sensors, controllable power switches, a battery storage system and a controller with human machine interface. The outcomes of the energy management system are control signals that regulate the operation of the power switches and the inverter of the battery storage system.

A device operation setting apparatus includes a calculator and a determiner. The calculator calculates, based at least in part on a relationship between a setting value regarding operation control of a device and a consumed power of a device, a target value of the consumed power of the device. The determiner determines the setting value to cause that a difference between an actually measured consumed power of the device and the target value of the consumed power of the device calculated by the calculator is within a prescribed range.

An industrial machine system includes an industrial machine including circuitry which controls operation of a control target machine based on multiple parameters and a set control mode among multiple control modes, and a terminal device including circuitry which changes at least part of the parameters in the industrial machine through wireless communication. The circuitry of the industrial machine sorts out, based on the set control mode, changeable parameters changeable by the terminal device among the parameters, and the circuitry of the terminal device controls display of the changeable parameter sorted by the circuitry of the industrial machine on a display.

An industrial machine system includes an industrial machine including circuitry which controls operation of a control target machine based on multiple parameters and a set control mode among multiple control modes, and a terminal device including circuitry which changes at least part of the parameters in the industrial machine through wireless communication. The circuitry of the industrial machine sorts out, based on the set control mode, changeable parameters changeable by the terminal device among the parameters, and the circuitry of the terminal device controls display of the changeable parameter sorted by the circuitry of the industrial machine on a display.