PLC programming of Domestic central heating system Part 2 скачать в хорошем качестве

PLC programming of Domestic central heating system Part 2

Consider a more complex temperature control task involving a domestic central heating system. The central heating boiler is to be thermostatically controlled and supply hot water to the radiator system in the house and also to the hot water tank to provide hot water from the taps in the house. Pump motors have to be switched on to direct the hot water from the boiler to either, or both the radiator and hot water systems according to whether the temperature sensors for the room temperature and the hot water tank indicate that the radiators or tank need heating. The entire system is to be controlled by a clock so that it only operates for certain hours of the day.