D2 FrameType not parsed correctly [HDLC, LN=0]

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By lukasm , 21 February, 2022
Forums
Gurux DLMS for Java

Hello,
I am facing the issue with incorrect translation of register's scaller & unit values during profile read process.
We have two identical example meters which only differ by content of profile.
I will mark them as meter A and meter B.
Both of them are read through HDLC interface with Logical Name Referencing = 0.
Meter A has a profile programmed with 9 registers, meter B has 17 registers.
I have observed that, when the amount of registers is higher than some value, then the Meter sends data in different frame type.

Transmission logs:
meter A:

TX: 7E A0 2C 00 02 68 47 41 FA D4 CB E6 E6 00 05 09 02 48 B0 02 25 E8 02 1D A8 02 1E 50 02 1F 08 02 24 88 02 25 38 02 2E D0 02 2E 20 64 4C 7E
RX: 7E A0 50 41 00 02 68 47 [DE] 30 44 E6 E7 00 0C 09 00 02 02 0F 00 16 FF 00 02 02 0F FE 16 1E 00 02 02 0F FE 16 1E 00 02 02 0F FE 16 20 00 02 02 0F FE 16 20 00 02 02 0F FE 16 20 00 02 02 0F FE 16 20 00 02 02 0F FE 16 1E 00 02 02 0F FE 16 1E 24 CF 7E
frameType: DE

Meter B:
TX: 7E A0 44 00 02 80 51 41 3A AF 75 E6 E6 00 05 11 02 48 B0 02 25 E8 02 1D A8 02 1E 50 02 1F 08 02 24 88 02 25 38 02 9A F8 02 9B 88 02 9C 18 02 9C A8 02 9D 38 02 9D C8 02 2C C0 02 2D 70 02 A8 78 02 AA B8 08 68 7E
RX: 7E A8 50 41 00 02 80 51 [D2] C2 AD E6 E7 00 0C 11 00 02 02 0F 00 16 FF 00 02 02 0F FE 16 1E 00 02 02 0F FE 16 1E 00 02 02 0F FE 16 20 00 02 02 0F FE 16 20 00 02 02 0F FE 16 20 00 02 02 0F FE 16 20 00 02 02 0F FE 16 23 00 02 02 0F FE 16 23 72 A9 7E
TX: 7E A0 0A 00 02 80 51 41 51 5D E9 7E
RX: 7E A0 44 41 00 02 80 51 [D4] F7 3F 00 02 02 0F FE 16 23 00 02 02 0F FD 16 21 00 02 02 0F FD 16 21 00 02 02 0F FD 16 21 00 02 02 0F FE 16 1E 00 02 02 0F FE 16 1E 00 02 02 0F FD 16 FF 00 02 02 0F FD 16 FF C8 E4 7E

frameType: D2/D4

Translated with GuruxDLMSTranslator:

meter A:
<HDLC len="43" >
<TargetAddress Value="23075" />
<SourceAddress Value="32" />
<!--I frame.-->
<FrameType Value="FA" />
<PDU>
<ReadRequest Qty="9" >
<VariableName Value="18608" />
<VariableName Value="9704" />
<VariableName Value="7592" />
<VariableName Value="7760" />
<VariableName Value="7944" />
<VariableName Value="9352" />
<VariableName Value="9528" />
<VariableName Value="11984" />
<VariableName Value="11808" />
</ReadRequest>
</PDU>
</HDLC>
<HDLC len="79" >
<TargetAddress Value="32" />
<SourceAddress Value="23075" />
<!--I frame.-->
<FrameType Value="DE" />
<PDU>
<ReadResponse Qty="9" >
<Data>
<Structure Qty="2" >
<Int8 Value="0" />
<Enum Value="255" />
</Structure>
</Data>
<Data>
<Structure Qty="2" >
<Int8 Value="-2" />
<Enum Value="30" />
</Structure>
</Data>
<Data>
<Structure Qty="2" >
<Int8 Value="-2" />
<Enum Value="30" />
</Structure>
</Data>
<Data>
<Structure Qty="2" >
<Int8 Value="-2" />
<Enum Value="32" />
</Structure>
</Data>
<Data>
<Structure Qty="2" >
<Int8 Value="-2" />
<Enum Value="32" />
</Structure>
</Data>
<Data>
<Structure Qty="2" >
<Int8 Value="-2" />
<Enum Value="32" />
</Structure>
</Data>
<Data>
<Structure Qty="2" >
<Int8 Value="-2" />
<Enum Value="32" />
</Structure>
</Data>
<Data>
<Structure Qty="2" >
<Int8 Value="-2" />
<Enum Value="30" />
</Structure>
</Data>
<Data>
<Structure Qty="2" >
<Int8 Value="-2" />
<Enum Value="30" />
</Structure>
</Data>
</ReadResponse>
</PDU>
</HDLC>

Meter B:
<HDLC len="67" >
<TargetAddress Value="24616" />
<SourceAddress Value="32" />
<!--I frame.-->
<FrameType Value="3A" />
<PDU>
<ReadRequest Qty="17" >
<VariableName Value="18608" />
<VariableName Value="9704" />
<VariableName Value="7592" />
<VariableName Value="7760" />
<VariableName Value="7944" />
<VariableName Value="9352" />
<VariableName Value="9528" />
<VariableName Value="39672" />
<VariableName Value="39816" />
<VariableName Value="39960" />
<VariableName Value="40104" />
<VariableName Value="40248" />
<VariableName Value="40392" />
<VariableName Value="11456" />
<VariableName Value="11632" />
<VariableName Value="43128" />
<VariableName Value="43704" />
</ReadRequest>
</PDU>
</HDLC>
<HDLC len="79" >
<TargetAddress Value="32" />
<SourceAddress Value="24616" />
<!--I frame.-->
<FrameType Value="D2" />
<NextFrame Value="0C110002020F0016FF0002020FFE161E0002020FFE161E0002020FFE16200002020FFE16200002020FFE16200002020FFE16200002020FFE16230002020FFE1623" />
</HDLC>
<HDLC len="12" >
<TargetAddress Value="24616" />
<SourceAddress Value="32" />
<!--S frame.-->
<FrameType Value="51" />
<Command Value="NextFrame" />
</HDLC>
<HDLC len="67" >
<TargetAddress Value="32" />
<SourceAddress Value="24616" />
<!--I frame.-->
<FrameType Value="D4" />
<NextFrame Value="0002020FFE16230002020FFD16210002020FFD16210002020FFD16210002020FFE161E0002020FFE161E0002020FFD16FF0002020FFD16FF" />
</HDLC>

Could You verify if there is any issue with translation done by GX library?
Frames recevied from both meters look very similar but the outcome from the library is totally different and I'm not able to parse it correctly.

Thanks,
Lukasm