Automatic driving system of a boiler

An automatic operation system of boiler, including interlock check step, sequential ignition control step, water softening step, operating step of pump can achieved in PLC and operating step according to the condition of boiler controlled by computer is disclosed. Because the boiler operating system is constructed by common PLC and computer the maintenance is easy. And even when the hardware of boiler is changed or increased, management of the boiler can be accomplished by program control. By that the operation of the boiler is economical and efficient.