With the industrial automation technology transformation, many enterprises are facing with issues that are the transformation of traditional production lines and re-design in the industrial line control system. PLC is a microprocessor as the core of industrial control equipment. PLC combines the traditional relay-contactors control system with computer technology. PLC can save the complexity of wiring and raise labor productivity and reduce the failure rate. The subject first uses AC contactor for the experiment of motor control, then PLC achieves the delay motor control in pipelined system. PLC control system gives the design of hardware and software and the implementation of the ladder and the PLC control procedures. The use of PLC control system allows system to run reliable, simple equipment, and a flexible control to ensure what production needs.
Keywords Motor sequence control Relay-contactors control PLC