PLC debugging method of programmable logic controller which uses general purpose microprocessor

摘要

The MPU of the PLC backs up the identification information and file information of the stop step in the steps included in the user program to the data storage unit and sets the stop step for debugging by replacing the exception interrupt code in the compile code area of the stop step ; And stopping the PLC operation in the step where the MPU executes the user program step by step while the MPU is in operation of the PLC and the exceptional interrupt code is provided, in a method of debugging a PLC using the general purpose microprocessor.