Interface method and circuit between numerical controller and PLC

摘要

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an interface method circuit between a numerical control device and a programmable logic controller (PLC). The present invention has been devised to improve a conventional problem in that a parallel communication method cannot be performed.;The present invention relates to an interface circuit connected as a system bus between a numerical controller and a PLC, wherein the interface circuit is configured to transmit data to be transmitted from the numerical controller to the PLC and data to be transmitted from the PLC to the numerical controller. It is characterized by including a shared memory for temporarily storing contact communication, the parallel data communication between the numerical control device and the PLC is possible, the communication speed can be increased.