用户定义功能块(UDFB)之于可编程逻辑控制器就像功能之于微控制器一样。两者都是用于简化代码的结构，使其更容易编写，故障排除和维护。它们也是允许代码在将来被重用的基本结构。 本文引用地址： 本文概述了在Arduino Opta 1中使用的简单UDFB的构造。

The Arduino Pro Opta series has emerged as a catalyst in the world of industrial automation, offering robust and flexible solutions that cater specifically to the needs of PLC engineers. With the ...

While the Arduino organisation has been making industrial single-board computers for a while, it has finally taken the plunge and produced a complete industrial product – and industrial controller ...