IEC 61131是国际电工委员会(IEC) 制定的可编程逻辑控制器标准。在IEC编号系统更改以前，称为IEC 1131。(IEC 61131 is a programmable logic controller standard established by the International Electrotechnical Commission (IEC). Before the IEC numbering system changes, it is called IEC 1131.)