求翻译：图 4中 LM393P两路输出的信号分别为 A、B相脉冲 , 当电机正转时 , A相脉冲的相位总是超前于 B相脉冲的相位 , 反转时 , B相脉冲的相位超前于 A相脉冲的相位。这样 , 把 A、B相脉冲接到 PLC的输入接口 , 通过 PLC自带的高速鉴相计数器对这两路信号进行计数与转速鉴相。是什么意思？

Figure 4 LM393P two output signals, respectively, as A, B phase pulse, when the motor is transferred, A-phase pulse phase is always ahead of the B-phase pulse phase reversal when, B-phase pulse phase ahead of the A with pulse phase. Thus, the A, B-phase pulse input interface receives the PLC by PLC

Figure 4 in 393 LM P two output signal A respectively, B sang pulse, when motor is being transferred, A Sang-Pulse phase is always ahead of the B Sang-Pulse phase and inverse, B sang pulse phase ahead of the A sang pulse phase. In this way, the A , B sang pulse received PLC PLC through the input int

Figure 4 LM393P two group output signals respectively are A, the B pulse, when electrical machinery clockwise, when A pulse phase always in advance in B pulse phase, reverse, B pulse leading of phase in A pulse phase.Thus, A, the B pulse receives PLC the input connection, carries on the counting and

Figure 4 LM393P in each of the two output signals for a, b-phase Pulse, as you motor forward, phase a phase is always ahead of the b-phase Pulse-pulse phase, flipped, ahead of a, b-phase Pulse phase Pulse phase. In this way, PLC received a, b-phase Pulse input, through the PLC comes with the high sp

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