单转子风扇如何转速控制同时显示在位

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问题描述

将单转子的风扇Fan属性里面的RearPresence置0后，网页上不显示在位信息，但是可以进行风扇控制

"Fan_3": {
      "FanId": 3,
      "Slot": 3,
      "Coefficient": 60,
      "FrontPresence": "<=/Scanner_Fan3_Presence.Value",
      "RearPresence": 0,
      "FrontSpeed": "<=/Scanner_Fan3_Speed.Value |> expr(($1 // 32) & 255)",
      "RearSpeed": "<=/Scanner_Fan3_Speed.Value |> expr(($1 // 32) & 255)",
      "HardwarePWM": "#/Accessor_Fan3_PWM.Value",
      "SystemId": 1,
      "FrontStatus": 0,
      "RearStatus": 0,
      "MaxSupportedPWM": 255,
      "IdentifySpeedLevel": 35,
      "Position": "CLU",
      "PowerGood": "<=/Scanner_PowerGood.Value"
    },

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image174×160 1.75 KB

但是把RearPresence改成scanner扫描就不能控制风扇转速了，应该如何进行适配