such as high reliability in industrial production process, has been widely used.
It application large-scale integrated circuits ， Internet technology and
communication technology development achievements, and gradually formed a has
many advantages and mini， medium， large and super large specifications of the
various series of products, from relay control system applied to monitor the
many control area between computers.With the continuous development of society，
building more and more high， but the elevator became the top of the building
must equipment. Elevator from handle switch manipulate elevator， button control
of elevator to the development of the present group control elevator， for
high-rise transport made indelible contribution。PLC in elevator lift control
of the application lies in its logical switch control function. Because of PLC
has logic operations, counting and timing and data input and output functions。
In the elevator lift process， all kinds of logic switch control and PLC good
union， good realized to lift control。This paper introduces the development
of the elevator in the elevator control and application of PLC。 Specific
discusses how to use the Siemens PLC of the technology for the control of elevator
on speed. Without any increase in hard equipment conditions, implements current，
speed and displacement three—ring control.个人收集整理，勿做商业用途本文为互联网收集，请勿用作
商业用途
Key Words ：Programmable Logic Controller； elevator; Siemens
目 录
中文摘要………………………………………………………………
