用PLC实现分部传动造纸机数字速度链

Implementation of Digital Speed Chain by PLC in Separated Driving in Paper Machine

速度链是分部传动造纸机中连接各分部所需速度给定的一个关键控制单元。PLC不仅有强大的逻辑功能,还具备快速的数字运算功能及较高的可靠性和稳定性。本文介绍了如何用PLC实现速度链及其与传统模拟量控制的速度链相比较的优越性。

Speed chain is a key control unit connecting the set speed needed of divided parts of paper machine in the separated driving.A programmable logic controller(PLC)has not only strongly logical function,but also swift figure-calculation function with reliability and sta-bility.The paper introduces how to utilize PLC to implement the speed chain and compare the advantages between the speed chain of PLC and that of traditional simulative controller.