1. A first automation unit and at least one second automation unit for controlling and/or monitoring two or more pieces of equipment in a premises, to form, when implemented in said premises, a distributed control system, the first automation unit comprising: a first, local database to store at least data from sensors and controlled equipment controlled by said first unit and at least events determined by said first unit; at least one second database to store at least data from sensors and controlled equipment controlled by said at least one second unit and events determined by controller of said at least one second unit; a controller, forming part of said distributed system to analyze data in said first local database for activating equipment and to use data in said at least one second database for activating controlled equipment controlled by said at least one second unit; and a communication module to communicate at least said first local database with said at least one second unit; and said at least one second automation unit comprising: a third, local database to store at least data from sensors and controlled equipment controlled by said second unit and at least events determined by said second unit; at least one fourth database to store at least data from sensors and controlled equipment controlled at least by said first unit and events determined at least by said controller of said first unit; a controller, forming part of said distributed system to analyze data in said third local database for activating equipment and to use data in said at least one fourth database for activating controlled equipment controlled by at least said first unit; and a communication module to communicate at least said third local database with at least said first unit, to update its said second unit database.