自定义功能块在自动化设备中的应用

Derived Function Block and Its Application in Automatic Equipment

分析了Schneider公司PLC Unity Pro软件所带有的自定义功能块(DFB),对功能块进行创建与设置,并在可编程逻辑控制器(PLC)程序中予以实现,实施对气缸的控制。应用结果表明,通过对DBF的应用,使控制设备所有相关的逻辑与显示都集中在一个单独的功能块中,既方便了程序的管理与修改,又能简化程序、方便调试,大大减少了编程工作量,提高了工作效率。

This paper analyzes the derived function blocks（DFB） of the software Schneider programmable logic control（PLC） Unity Pro, creates and sets the function blocks, and applies them to a PLC program to control a cylinder. By using DFB, all logic control devices and the display are integrated a single block. It is necessary to f changes, and simplify debugging procedures so as to signifi and improve efficiency. acilitate the program management and cantly reduce the programming effort