GXDLMSTranslator.DataToXml vs signed Integers

By DanB, 4 March, 2024
Forums
Gurux.DLMS

Hi,
Is there any documentation available on what DatatoXML should produce in SimpleXML mode?

Hit an odd thing in v9.0.2205.2301 and confirmed it still occurs in v9.0.2402.2201

Converting any signed integer with a negative value seems to give a 64bit hex value in the XML.

passing data as 0x10FFFB (16bit Integer value = -5)
results in <Int16 Value="FFFFFFFFFFFFFFFB" />

Similar for 0x0FFB (8bit signed int = -5) => <Int8 Value="FFFFFFFFFFFFFFFB" />
And 0x05FFFFFFFB (32bit signed int =-5) => <Int32 Value="FFFFFFFFFFFFFFFB" />

Is this "expected behavior"?

Cheers Dan

Kurumi

1 year 11 months ago

Hi Dan,

DatatoXML converts DLMS data to the XML and the output depends on the content. So output can be anything.

C# ToString shows a negative number as 64-bit value. This is fixed for the next release and extra bits are removed.

If you don't want to see output as a hex you can also set hex to false.

GXDLMSTranslator t = new GXDLMSTranslator();
t.Hex = false;

BR,
Mikko

DanB

1 year 11 months ago

Hi Mikko,

Hex is fine!
But i was expecting the length of the output value to match the declared type / amount of data passed in.

<Int8 Value="FB">
<Int16 Value="FFFB">
<Int32 Value="FFFFFFFB">

It is strange to pass in a 1 byte value and get 8 bytes out.. no?

Dan