关键词：制丝生产线;混叶切丝段;PROFIBUS-DP网络;闪断;中继器;Tobacco primary processing line;Tobacco blending and cutting section;PROFIBUS-DP network;Flash break-off;Repeater
摘 要：为解决制丝生产线PROFIBUS-DP网络出现的闪断现象,对混叶切丝段PROFIBUS-DP网络结构进行了改进.检查PROFIBUS-DP通讯电缆双层屏蔽,保证“多点接地”；紧固或更换PROFIBUS-DP接头；规范PROFIBUS-DP通讯电缆布线方式,减少相互干扰；利用中继器对PROFIBUS-DP网络进行分割,减少子站之间相互影响.应用效果表明,改进后混叶切丝段运行稳定,PROFIBUS-DP网络故障停机次数由平均3次/月降低到0次,提高了网络的可靠性和抗干扰能力.