在测试模式下，可按如下方式对继电器数字输入量(接点输入量)进行预编程:如果输入量状态设为“取消”，则输入量保持完全可操作。这个量通过其输入端子上的电压进行控制，并能通过外电路进行开1关操作。如果在测试期间，必须使某个给定输入量可操作

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