IEC 61131和IEC 61499标准

First came IEC 61131, which was created and finalized in 1992 to help simplify and speed the programming of programmable logic controllers (PLCs). Its development was prompted by the manufacturing industry, which was seeking to create production systems that were more flexible and reconfigurable.

IEC 61499 was later developed in an attempt to provide a more effective plug-and-play environment for function blocks. Promulgated in 2005, IEC 61499 defines a reference architecture for open, distributed control systems. Thus, a function block can be used on different processing systems and equipment, as well as being used in different programming languages. IEC 61499 allows function blocks that encapsulate software functionality.

使用标准可以大大减少所需的培训量，尤其是在制造商设施之外教授该标准的情况下。那些使用IEC标准的制造商现在可以聘请接受过标准培训的工程师。“如果工程师去PLC品牌学校或提供61131课程的科技大学，工程师可以在任何利用61131的工厂中使用它，”伊利诺伊州帕拉蒂恩市Schneider Electric的自动化产品经理Rich Hutton说：“伊利诺伊州Palatine。工程师变得更加高效，学习曲线很短，这意味着工作较早完成。”

该标准还允许制造商在不同的环境和语言中使用相同的代码。“您可以使用61131编程以几种不同的语言来设置相同的功能，” Bosch Rexroth Corp.的电子商务经理Joe Biondo在伊利诺伊州霍夫曼庄园（Hoffman Estates）的E-Business Manager。逻辑而无需考虑代码。”

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