Ansi C with IEC 62056-21

By labasvakaras , 3 May, 2023
Forums
Gurux.DLMS

If my device does not use any password, is it possible to read cosem objects using IEC 62056-21?

labasvakaras

3 years 4 months ago

Actually, I don't understand the scheme: you need to establish connection with IEC 62056-21 mode E (IEC62056-21 Handshake, like specified here: https://www.gurux.fi/DLMSIntro

and then you just continue to communicate with DLMS messages? (requests etc)

Kurumi

3 years 4 months ago

Hi,

If your meter is supporting the IEC 62056-21 you can read the meter if you know the OBIS codes that you want to read. Or you can try to get a readout.

You should know that there are lots of differences between IEC 62056-21 meters.

Some meters are using IEC 62056-21 only for moving to Mode E and only that is supported from IEC 62056-21. You can't ask for any objects with IEC 62056-21.

If the meter is supporting DLMS, use it. because meters are more standardized and you can get more data from the meter.

BR,
Mikko

labasvakaras

3 years 4 months ago

I have CL730S22 meter: i successfully used ANSI C to read values through RS485.

Now i want to test optical meter. Documentation says:

The optical port is designed according to IEC62056-21 mode-E and IEC62056-46 in the data link layer.

So, if I understand correctly, everything should work as it is? I just need to add IEC 62056-21 handshake before trying to initialise connection with gurux?

Kurumi

3 years 4 months ago

Hi,

You need add IEC 62056-21 handshake to move Mode E and afer that you can use DLMS in the same way as with RS-485.

BR,
Mikko