PLCopen推荐的编码指南。编码准则的目的是定义一组规则并提供一个PLCopen 建议如何使用这些规则。现在大型自动化公司都有自己的规则，但许多中型公司或IEC 61131-3初学者对使用PLCopen的指导原则非常感兴趣。这些准则将对IEC 61131-3在世界范围内的进一步推广产生重大影响。

基于IEC 61131-3标准的控制系统及应用 IEC标准的详细介绍

The IEC (International Electrotechnical Commission) is a worldwide organization for standardization comprising all national electrotechnical committees (IEC National Committees). The object of the IEC is to promote international co-operation on all questions concerning standardization in the electrical and electronic fields. To this end and in addition to other activities, the IEC publishes International Standards. Their preparation is entrusted to technical committees; any IEC National Committee interested in the subject dealt with may participate in this preparatory work. International, governmental and non-governmental organizations liaising with the IEC also participate in this preparation. The IEC collaborates closely with the International Organization for Standardization (ISO) in accordance with conditions determined by agreement between the two organizations.

回馈网友 ，《IEC 61131-3编程语言及应用基础》高清带书签教程。

Beckhofff 经典IEC61131-3资料 Karl-Heinz John. Michael Tiegelkamp IEC61131-3

这是IEC 61131-3编程手册，参考学习非常有用。内容还有比较少，所以不要分了