PLC Method for running PLC operating system

摘要

The present invention relates to a method of operating a PLC operating system, and more particularly, to a method of operating a PLC operating system that downloads an operating system by referring to a register in the MPU, loads the latest operating system among the downloaded operating systems, and drives the loaded operating system. A method of operating a PLC operating system according to an embodiment of the present invention includes the steps of determining a state of a communication port of the MPU by referring to a register in the MPU, and when the communication port is active and an operating system update notification signal The method comprising: downloading an operating system from the external device via the communication port when the data is received; storing the downloaded operating system in a first memory unit; storing the latest operating system among the one or more operating systems stored in the first memory unit in the second memory unit And operating the latest operating system with reference to the second memory unit.