/// <summary>
/// 读取设备的主变量
/// </summary>
public DeviceVariable ReadPV(bool optical = false)
{
if (!optical || (_PV == null && _ID != null))
{
_PV = _HartComport.ReadPV(_ID.LongAddress);
}
return(_PV);
}
/// <summary>
/// 设置主变量单位代码
/// </summary>
public bool WritePVUnit(UnitCode unitCode)
{
if (_ID == null)
{
return(false);
}
bool ret = _HartComport.WritePVUnit(_ID.LongAddress, unitCode);
if (ret)
{
_PV = null;
_PVOutput = null;
_PVSensor = null;
}
return(ret);
}
/// <summary>
/// 读取设备的主变量
/// </summary>
public DeviceVariable ReadPV(long longAddress)
{
DeviceVariable ret = null;
RequestPacket request = new RequestPacket()
{
LongOrShort = 1, Address = longAddress, Command = 1
};
ResponsePacket response = Request(request);
if (response != null && response.DataContent != null && response.DataContent.Length >= 5)
{
ret = new DeviceVariable();
ret.UnitCode = (UnitCode)response.DataContent[0];
ret.Value = BitConverter.ToSingle(new byte[] { response.DataContent[4], response.DataContent[3], response.DataContent[2], response.DataContent[1] }, 0);
}
return(ret);
}