Description
水泥厂的回转窑和磨机相隔距离很远，操作站可以安装在两个地方。这时一台操作站配置一台打印机。如果其中一台操作站的主机坏了，这台操作站显示的内容就没有了。为了系统的安全运行，采用标签的重叠组态来实现安全运行。如该系统有两台操作站，分别为A站和B站，该系统有2000个标签，A、B操作站要分别组态1300个标签，其中300个标签是重叠的。
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