HDLC length question in "Gurux DLMS Translator"

By qiumike , 27 February, 2024
Forums
DLMSDirector

Hi there.

I'm new to the DLMS world and currently using this wonderful tools to help with meter development.

I just don't know for these two frames, why the len field in the parsed xml doesn't match the actual frame
e.g.
* First frame's len is 0x0A but in XML it is "C"
* 2nd frame's len is 0x23 but in XML it is "22"

Could anyone help to explain this?

Thx!

Kurumi

2 years 6 months ago

Hi,

HDLC len 0xC is the total length of the HDLC frame. It includes all the data in the HDLC frame (including bytes before HDLC frame length).

BR,
Mikko

qiumike

1 year 9 months ago

Hi Mikko

According this logic, I think the "HDLC len" of the second frame should be 25 instead of 22, could you further explain the logic? Thx!

BR,
Mike

qiumike

1 year 9 months ago

Hi

Here is the frame:

7E A0 23 03 00 02 C0 01 73 D9 52 81 80 14 05 02 01 4A 06 02 01 4A 07 04 00 00 00 01 08 04 00 00 00 01 E8 AB 7E

BR,
Mike