Abstract:In view of the steam curing craft of concrete component, a stacking machine for precast concrete was designed based on PLC, frequency control, configuration software and OPC technology, which was used for automatic steam curing concrete. The addressing technique was applied to walking system of the stacking machine,to guarantee precise position control of the control system. The interlocking conditions were taken into full account while programs were developed, thus the safety performance could be guaranteed. Customer's feedback indicates that the stacking system runs stably, moreover productivity is improved greatly.