“如果有用过西门子S7－200 SMART系列 PLC的学员，应该会知道PLC提供了各种模块和插入式板，用于扩展CPU 的功能，那么S7－1200 系列PLC也不例外。S7－1200系列PLC的扩展模块包括三类，信号模块、信号板和通信模块。信号模块是扩展在CPU的右侧，信号板扩展在CPU的正 ...

In part one of this series, we looked at the PLC’s internal architecture, briefly discussed Ladder Logic programming, Human-Machine Interfaces, advantages of the PLC’s ability to react consistently ...

Recently I became interested in PLC programming. I'm not planning on working in this field on building a career, just want to play with a bit. I've some background in software development and ...

Though PLC (programmable logic controller) programming languages may not receive the attention that general computing programming languages, such as JavaScript, C#, or Python do, they remain critical ...