/// <summary> /// 讀保持寄存器03 /// </summary> /// <param name="timeout">數據讀取延遲</param> /// <param name="slaveAddress">設備從站地址</param> /// <param name="startAddress">數據起始地址</param> /// <param name="regCountIn">寄存器數量</param> /// <param name="holdRegs"