METHOD FOR DISPLAYING PROGRAM IN PROGRAMMABLE CONTROLLER

摘要

PURPOSE:To shorten developing and down time by specifying an I/O to be the cause of the formation/unformation of a condition expression to a user at the time of generating a program debugging or a fault to help the user to inspect the cause. CONSTITUTION:A condition expression converting means 2 extracts/converts a condition expression from a program storing means 1, an I/O value storing means 4 stores an I/O to be used for each condition expression and its value from a program executing means 3 and a condition expression discriminating means 5 substitutes the I/O value for a converted expression and decides the I/O of a cause. A display means 6 displays a program including the original condition expression and displays a result obtained by applying a decided result to the condition expression. Consequently, the result of program execution can easily be decided in the executed state of the program and program debugging or system abnormality can quickly be resolved at the time of its generation.