Research on the PLC Technology Solutions in Four-Story Elevator Control and Renovation

PLC has many advantages, such as simple structure, high reliability and easy maintenance, therefore, it has been broadly applied in the elevator control. According to the author´s work and learning experiences, based on the actual work in the old elevator renovation, this paper first worked out a programmable PLC technology solutions in four-story elevator control applications in the design and processing for he elevator control system random signal logic, and then discussed the design and PLC programming for the similar elevator system renovation. The results of this paper have a certain significance for the PLC application in the elevator control system and old elevator system´s renovation and technological upgrading.