Abstract: Based on personal computer environment,this paper constructs a simulation platform of parallel elevator control system using the development tool GX Developer of programmable logic controller(PLC) and developer tool GT Designer of touch panel.The platform can realize the software simulation of the control system of the parallel elevator.It can verify the development process and running process of the control program,so this platform has the engineering application value.

Key words: sequence function chart； programmable logic controller； parallel elevator；