主要介绍S-200的几个具体工程，很详细介绍西门子PLC200系列的开发实例。-Introduces the S-200 in several specific projects, it details the development of Siemens PLC200 series of examples.

西门子S7-200和S7-300以太网通讯例程，包括说明。-Siemens S7-200 and S7-300 Ethernet communication routines, including instructions.