PLC

Create Programs using FBD Function Block Diagram

Q) A room contains an exhaust and fresh air fan. The fresh air fan should start after two seconds of start of exhaust fan. A push button is used to start the exhaust fan. A stop button is used to stop the whole system. Besides stop button, a pressure regulator is installed to monitor the pressure of the room and when a flow pressure is increased, it give a message and trigger the shut off both fans.