2015/7/20 14:02:34 来源: 深圳长欣自动化设备有限公司
AC电压数字输出模块上,采用OVD诊断出故障的开关将会使输出信号跃进变为最大半个AC周期的反状态,这种变化不会对现场设备造成影响。一旦故障被检测出来,模块就不再继续进行OVD。在AC电压数字输出模块上的每个点都需要周期性的在ON在OFF状态两者上循环,以保证100%的故障覆盖率。
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