和所有的PLC一样，如果仅仅用于代替继电器的开关量控制，的确容易入门。要用好FX系列PLC，主要需要学习以下内容：
1．全面了解FX的指令系统。FX系列有200多条应用指令，需要掌握基本指令和常用的应用指令的功能和使用方法，包括子程序和中断程序的编程方法。
2．FX3U、FX3UC是FX2N和FX2NC系列的升级产品，FX3G是FX1N系列的升级产品。FX2N已于去年停产。需要了解FX3U、FX3UC和FX3G的硬件和新增的指令和应用指令新增的表示方法。
3．三菱全系列PLC的编程软件GX Developer的功能强大，需要熟悉它的使用方法，包括生成与调试用户程序，生成与显示注释、声明和注解，帮助功能的使用和PLC参数设置等。
4．掌握使用STL指令或顺序功能图语言（SFC）的顺序控制编程方法。
and mixed media) and network topology can be selected for the system bus.
Simple layout, due to the use of TCP/IP protocol, the system can also use the public telephone network (dial-up mode) or satellite to achieve ultra-long-distance communication.
Subsystems such as PLC communicate with the Industrial” system through the ModBus protocol interface. The system also supports IEC870-5 over-control protocol.
discussion.
The Flash EPROM inside the PS provides more than 220 functional modules (control algorithm subroutines), in addition to the basic ones specified in the IEC 61131 3 standard
In addition to this content, many powerful and rigorously tested function blocks from actual engineering applications have been expanded. any complex control
The scheme can be realized by the combination of these function blocks.
The function blocks provided by the system mainly include the following
