FPGA Implementation of Programmable Logic Controller Compliant with EN 61131-3

作     者：Robert Czerwinski Miroslaw Chmiel Wojciech Wygrabek 

作者机构：Silesian University of Technology Institute of Electronics Gliwice Poland 

出 版 物：《IFAC Proceedings Volumes》 

年 卷 期：2013年第46卷第28期

页      面：138-143页

主　　题：Programmable logic controllers PLC Central processing unit EN 61131-3 Programming languages Scan time Field programmable gate arrays FPGA 

摘      要：The paper discusses the design process of a simple programmable logic controller. The conception of the PLC is presented. The idea is to develop PLC, which is compatible with EN 61131-3 standard. This part of standard refers to programming languages. However, instructions of the PLC are directly related to the hardware structure of the PLC. The most important part of the PLC is central processing unit and the paper especially focuses on this aspect. Instruction set, encoding and some elements of the design are presented and the paper is structured to show design flow from instruction list to a hardware design. The CPU was implemented in FPGA device.