The designed of the elevator system of frequency conversion timing based on siemens PLC
Abstract: With the development of the economy, microelectronic technology, computer technology and the automatic theory are developed rapidly, the AC variable frequency technology has been in a new state. Its application is becoming more and more widely. But the elevator as an important traffic in skyscraper，it also has developed quickly with the improving requirement of the people .Its dragging technology has developed from DC timing to AC variable frequency timing and its logic control- relay control also has been replaced by PLC.
On this paper, it was based on by the control technology of the elevator, aim at the some weakness of the haulage elevator of the past, the popular PLC control technology and change the adjust soon total line in technique, the spot technique were adopted to every kind of control that realizes elevator. Siemens S7-300 was adopted to the programmable control in this subsystem, and was communicated through S7-400 with the computer of Industral Ethernet , The computer passes the software can proceed to the elevator with the on time long range supervises and control. but the rise and fall、rises to stop speed of the elevator was controlled by the transducer, The place of the floor was examined by revolution coder.
Key word: PLC control frequency conversion timing elevator Profibus
