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设备数据点采集周期设置小于一秒，页面数据还是一秒更新一次。
需要在前台设置一下
用的什么驱动，只有以下驱动的采集周期支持小于一秒： modbus tcp/rtu、abplc、西门子s7、西门子s7-200s、opcda opcua
