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目前不支持秒，你是采集周期是多少，你希望是多少秒时间段
@核桃酥 希望是在画面里图表2秒更新一次
采集周期多少，2s有几个数？太短了曲线没有意义吧。如果你只是希望一直更新，你可以历史数据配置轮询时间
