Description
应在与CD4513相连的PLC各输出端接一下拉电阻,以避免在输出继电器的触点断开时CD4513的输入端悬空。PLC输出继电器的状态变化时,其触点可能抖动,因此应先送数据输出信号,待该信号稳定后,再用LE信号的上升沿将数据锁存进CD4513。
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