some pdf files describing about PLC concepts and components.

The widespread use of embedded systems mandates the development of industrial software design methods, i.e. computer-aided design and engineering of embedded applications using formal models (frameworks) and standardized prefabricated components, much in the same way as in other mature areas of engineering such as mechanical engineering and electronics. These guidelines have been used to develop Component-based Design of Software for Embedded Systems (COMDES). The paper gives an overview of the COMDES framework, followed by a presentation of a generic component types, such as function blocks, activities and function units. The execution of function units is discussed in the context of a newly developed execution model, i.e. timed-multitasking, which has been extended to distributed embedded systems.

富士N系列可编程控制器PLC编程手册,介绍Flex N系列PLC的情况和其操作。-Fujitsu N Series Programmable Logic Controller PLC programming manual introduction of the Flex N Series PLC and its operation.

ID卡门禁系统，兼容EM4100,有液晶显示、存储10天的进出信息-ID card access control system, compatible with EM4100, has liquid crystal display, storage, 10-day access to information

自动注册配置的暂停和44b0常规程序ADC

嵌入式MYSQL编程例子,在WINDOWS或者LINUX上都可以运行-MYSQL programming examples embedded in the WINDOWS or LINUX can run on both

PIC16F1937 IIC读取数据代码-PIC16F1937 IIC read data code

freescale mc9s12hz256 step motor control

LCD SN　烧录　软件！可以烧录序列号，可以针对大部分LCD使用。-LCD SN copying software! Copying serial numbers can be used to address most of the LCD.

一种纸币识别VC++程序源码，并含有多国纸币的特征库，如日元、英镑、港币...的特征库。有从纸币图像预处理、特征匹配的全过程

基于vc语言的简单跑马灯程序可完成10层电梯的模拟控制-vc language based on the simple Bomadeng procedures to be completed 10-storey elevator control simulation