半闭环、全闭环兼容的位置控制数控飞锯系统

DF(PLC)-1型数控飞锯控制系统兼容了半闭环和全闭环两种位置控制方式。半闭环采取传统的2个旋转编码器控制方式。全闭环在半闭环基础上增加了1个固定在运行的飞锯床身上使用金属码盘编码器的3个旋转编码器控制方式。该系统中采用西门子通用可编程控制器S7—200，人机接口TD200，欧陆SSD-590直流驱动装置以及为此配置设计的专用接口板组成一个可靠、稳定、低成本的硬件平台。为此硬件平台设计的计算机程序(S7-200)、组态软件设置(TD200，SSD-590)，使本控制系统达到了BS标准中钢管定尺要求的控制精度。

Half-closed-loop and Whole-closed-loop Compatible Position-control Digit-controlling Flying-saw System

DF (PLC)-1 digit-controlling flying-saw control system gives consideration to two position-control ways of the half-closed-loop and the whole-closed-loop. The half-closed-loop takes two common rotary encoders. The whole-closed-loop uses three rotary encoders. It adds a metal-pan rotary encoder fixed on flying-saw's bed. In the control system,we use SIEMENS common PLC S7-200,human-machine port TD200,EUROTHERM SSD-S90 DC driver and a special port band designed for the formers. They consist a reliable,stable and low-cost hardware platform. For the hardware platform, we have designed computer program(S7-200) and the configuration software settings (TD200,SSD-590). This control system has reached the necessary precision of steel pipe length and up to the BS Standard.