SYMBOL DEFINITION METHOD FOR PROGRAMMABLE MACHINE CONTROLLER

摘要

A system of defining symbols (signal names) in a sequence program of a PMC (programmable machine controller). Since the functions of the signals between the PMC and a numerical control device are fixed, a first symbol group (5b) is fed to a program preparation device (1) as system data. Therefore, when preparing a sequence program, there is no necessity to define the first symbol group (5b). Also, the first symbol group (5b) is transferred to the PMC (20) together with the sequence program (5a) and is used for editing and maintenance.