1756-TBCH
1756-TBCH
1756-TBCH
输入输出故障诊断
输人输出是PLC与外部设备进行信息交流的通道，其是否正常工作，除了和输入输出单元有关外，还与联接配线、接线端子、***丝等元件状态有关。
出现输入故障时，首先检查LED电源指示器是否响应现场元件（如按钮、行程开关等）。如果输入器件被激励（即现场元件已动作），而指示器不亮，则下一步就应检查输入端子的端电压是否达到正确的电压值。若电压值正确，则可替换输入模块。若一个LED逻辑指示器变暗，而且根据编程器件监视器、处理器未识别输入，则输入模块可能存在故障。如果替换的模块并未解决问题且连接正确，则可能是I／O机架或通信电缆出了问题。
出现输出故障时，首先应察看输出设备是否响应LED状态指示器。若输出触点通电，模块指示器变亮，输出设备不响应。那么，首先应检查***丝或替换模块。若***丝完好，替换的模块未能解决问题，则应检查现场接线。若根据编程设备监视器显示一个输出器被命令接通，但指示器关闭，则应替换模块。
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厦门泰尼电气有限公司
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BIDDLE MAJOR MEGGER TESTER 21159 SERIES 1567042
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METRIC INJECTION MOLDING END CAP C-26 M66 9615
JAMESBURY 1 1/2" STAINLESS ACTUATED VALVE
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