PROGRAMMABLE LOGIC CONTROLLER USING MULTIPLE BUSES

摘要

The present invention relates to a programmable logic controller. The programmable logic controller includes a main control unit, a first bus that functions as a communication path for at least one I/O module and whose communication is controlled by the main control unit, and a second bus that functions as a communication path for at least one I/O module and is controlled by the at least one I/O module, so that it is possible to provide a high-performance bus technology specific to a programmable logic controller.