Abstract: The paper presents the method with the encoder and decoder instructions, with the switch of BCD in possession of six input points to realize the externally Setting up in the device parameter in PLC of multibit data.

• 文摘:本文提出应用数据编码指令和数据译码指令，用一位BCD码开关，占用六个输入点，实现多位数的PLC器件参数的外部设定方法。