关键词:PLC可编程控制系统,分散控制系统(DCS)安全仪表系统(SIS),ESD系统,振动监测系统,汽轮机控制 压缩机组控制系统(CCS)等各类工控系统部件
+1 7 7 8 6 0 3 2 5 1 6 微号 扣扣+2 1 7 7 4 9 6 9 4 6
·扫描结束状态的状态监控。在执行状态时执行菜单命令“调试”→“使用执行状态”,菜单中该命令行前面的“√”号消失,进入扫描结束状态。
扫描结束状态显示在程序扫描结束时读取的状态结果。这些结果可能不会反映PLC数据地址的所有数值变化,因为随后的程序指令在程序扫描结束之前可能会写入和重新写入数值。由于快速的PLC扫描周期和相对慢速的PLC状态数据通信之间存在的速度差别,扫描结束状态显示的是几个扫描周期结束时采集的数据值。
只有在RUN模式时才会显示触点和线圈中的颜色块,以区别RUN和STOP模式。
对强制的处理与执行状态基本上相同,强制和取消强制功能不能用于V、M、AI和AQ的位。在PLC处于RUN和STOP模式时都会显示强制状态。只有在“调试”菜单中选中了“STOP(停止)模式下写入一强制输出”(该项的左边出现“√”号),才能在STOP模式执行对输出Q和AQ的写操作。
②语句表程序的程序状态监控。启动语句表和梯形图的程序状态监控功能的方法xx相同。
用菜单命令“工具”→“选项”打开“选项”窗口,选择“程序编辑器”中的“STL状态监控”选项(见图5-8),可以选择语句表程序状态监控的内容,每条指令最多可以监控17个操作数、逻辑堆栈中4个当前值和1个指令状态位。
状态信息从位于编辑窗口顶端的{dy}条STL语句开始显示。向下滚动编辑窗口时,将从CPU中获取新的信息。
关键词:PLC可编程控制系统,分散控制系统(DCS)安全仪表系统(SIS),ESD系统,振动监测系统,汽轮机控制 压缩机组控制系统(CCS)等各类工控系统部件
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