PLC输出的加速,或减速信号的宽度须与VLT 2800的加速时间(RAMP UP TIME)或减速时间(RAMP DOWN TIME)配合设定。例如,假如RAMP TIME 设定为10秒,则每Hz加减速需200毫秒时间,2 Hz 需要 400毫秒。
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RAMP DOWN TIME 1 减速时间
They double time down the ramp, carrying their huge packs and kit bags.
他们背着巨大的装备包裹 快速的走下斜坡。
At this time often accompanied by sharp north wind, sleet snow white twisted into the strands of the whip, pumping down the ramp and moving, playing in people's faces, people very much pain;
这时常伴有犀利的北风,把雪霰拧成缕缕的白色鞭子,斜动着抽下来,打在人的脸上,让人很疼痛;
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