. pcl - 711b card offers many functions such as a / d conversion , d / a conversion , digital input and output and so on . in order to saving time , lightening the diffculty of programming , i take the programming method of driver level to control pcl - 711b card using visual basic6 . 0 language Pcl ? 711b卡提供了a d转换、 d a转换、数字量输入和数字量输出等i o功能，为了缩短开发时间，减轻开发的难度，本文采用了visualbasic6 . 0对pcl ? 711b卡进行驱动程序级编程来控制该卡。
The diploma project researches the three - coordinate nc system of the boring and milling machine . the system must depend on the hardware - ipc ( industry personal computer ) and on the windows software . the hardwares have the framework of embedding nc in pc , which means that the hardware is composed of ipc , the intelligent sport control card ( pcl - 839 ) and the i / o card ( pcld - 782 / 785 ) . we research the nc system based on the operating system of dos and develop it into the nc system based on the operating system of windows2000 . the new nc system will do better for the three - coordinate nc machine tool than the old one 本文是以本学院自行研制开发的印制电路板钻铣床为研究对象,以工控机为硬件平台,以windows为软件平台,硬件系统采用“ nc嵌入pc式”结构,即运用现有的工控机+运动控制卡+数字量输入输出卡的基本结构,把机床控制系统开发成基于windows环境下的数控系统,代替原有的基于dos操作系统下的控制系统,从而实现对三坐标数控钻铣床的控制。
Digital inputs are processed by fpga after being isolated by photocouplers . the results of digital inputs saved in fpga are read by tms320lf2407 periodically . the digital outputs being written to fpga are used to control empcs after being isolated by photocouplers and driven by darlington transistors 由于数字量的路数较多，因此采用了fpga进行扩展和简单处理，数字量输入通过光电隔离后送给fpga进行软件滤波，其结果由tms320lf2407定时读取； tms320lf2407输出的数字量先送给fpga ，再由fpga经过光电隔离和功率驱动后去控制机电式功率控制器。
When the egg - reached signal is sent to pc , through i / o card , the pc drives the video card to capture one frame picture to ram . after a series of mathematical analysis , the pc send the yolk color ' s or egg size ' s grading signals to outer signal delayed controller by i / o card again . last , the controller sends the delayed signals to outer execute equipment to finish classifying 蛋已到达光室的控制信号由数字量i o卡输入到计算机；计算机通过对端口的查询获知这一信号后立刻驱动图像采集卡将当前光室中的一帧图像采集到主机内存中，进行相应的计算分析后将光室中鸭蛋蛋芯颜色或大小分级信号再经由数字量输入输出卡，送至外部信号延时控制器；控制器将此信号延时后送至外部执行机构，完成分级动作。
All the function cards mscis interface system , including intelligent communication card and control card based on can bus , analog signal input card , analog signal output card , digital signal input / output card , have already debugged and operated normally . it met the research goal on the development of the mscis interface control system 目前mscis接口系统中的各个板卡包括基于can总线智能通信卡和控制卡，模拟量输入卡，模拟量输出卡及数字量输入输出卡都已调试运行正常，基本实现mscis接口系统研制开发目标。
These field control modules include : analog input / output module ao / ai , digit input / output module di / do , sound alarm module , record module , etc . the key works is to develop canbus net card and its driver which is based on can2 . 0a , configure software for the server pc and makeup communication protocol as well as modules driver programs 现场控制模块主要有模拟量输入输出ai / ao模块,数字量输入/输出di / do模块,语音报警模块和报警记录模块。本设计主要开发上位机组态软件和网卡通讯驱动程序,制定符合can2 . 0a的模块通讯协议和模块驱动程序。
