public void AddTag(Tag tag)
{
if (_tags.Contains(tag))
{
return;
}
var logixTag = new Logix.Tag(_controlLogix)
{
Name = tag.FullName(),
DataType = IngearHelper.ParseNetLogixDataType(tag.DataType)
};
logixTag.Changed += TagDataChanged;
tag.ValueChanged += TagValueChanged;
_tags.Add(tag);
_tagGroup.AddTag(logixTag);
}
public Task WriteTag(Tag tag, object value)
{
if (tag.Value == null && value == null)
{
return(Task.FromResult(true));
}
var task = _writeTaskScheduler.Schedule(() =>
{
tag.LockValue();
try
{
tag.DetectDataTypeForValue(value);
if (!IsConnected)
{
throw new PlcCommunicationException(
"IngearTagController can't write tag because there is no connection established!",
_controlLogix.IPAddress, string.Empty);
}
var logixTag = new Logix.Tag(_controlLogix)
{
Name = tag.FullName(),
DataType = IngearHelper.ParseNetLogixDataType(tag.DataType)
};
// for some reason we must read the tag at least once
if (logixTag.ErrorCode != 0)
{
_controlLogix.ReadTag(logixTag);
}
// handle special DataTypes like UDTs
ConvertToLogixTagValueFunction convertFunction;
if (_tagValueConverters != null &&
_tagValueConverters.TryGetValue(tag.DataType, out convertFunction))
{
logixTag.Value = convertFunction(value);
}
else
{
if (tag.DataType.Equals(IEC61131_3_DataTypes.Boolean))
{
if ((bool)value)
{
logixTag.Value = "True";
}
else
{
logixTag.Value = "False";
}
}
else
{
logixTag.Value = value;
}
}
var result = _controlLogix.WriteTag(logixTag);
if (result != ResultCode.E_SUCCESS)
{
throw new PlcCommunicationException("Can't write value to ControlLogix.",
_controlLogix.IPAddress,
_controlLogix.Path, logixTag.ErrorString);
}
}
finally
{
tag.ReleaseValue();
}
});
return(task);
}
