Problem with connection to ISKRA MT860 using serial communication

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By Denis , 1 January, 2017
Forums
General discussion

Hello,

i need to read obis codes from an iskra mt860 but i can't connect to it because the gurux software doesn't receive reply from iskra. I'm trying to connect to iskra through serial communication RS485 on two wires, using a simple serial communication software if i send only one command: "/?!" or "/?serial_number!" i don't get reply but if i send two commands in sequence i get reply from the iskra, someone know what is the problem?

If i send one command:

/?! --> No reply

If i send two commands in sequence:

/?!
/?! --> I get reply

Next week i will go back to the company where iskra is installed and i will have one week to make it working...

Thank you in advance for help, and i wish to everyone a happy new year!

Kurumi

9 years 5 months ago

Hello Denis,

You should send /?!\r\n.

BR,

Mikko

Denis

9 years 5 months ago

Hi Mikko,

thank you for your answer, ok i understand but with gurux direct what settings i must to set to add \r\n on the connection request? I tried to connect to iskra with gurux direct but it can't get the reply from iskra...
Now can't do some test because iskra device is installed in another company that stay in a far city from me, so i must to wait next week...

Thank you!
Denis

Kurumi

9 years 5 months ago

Hi,

You can't read ISKRA MT860 With GXDLMSDirector. MT860 is using IEC 62056 - 21, not DLMS.

BR,

Mikko

Denis

9 years 5 months ago

I thought that if i set Start protocol to IEC, software uses IEC protocol to communicate with devices...
Gurux framework uses also IEC protocol to communicate with devices? Or it's not implemented?

Best regards,
Denis.

Kurumi

9 years 5 months ago

Hi,

There are ASCII and binary mode in IEC. DLMS is using that binary mode. We are not support that ASCII mode because there are so many variations between meters.

BR,

Miikko

Denis

9 years 5 months ago

Ok thank you, I understood! In the following link i found specs of iskra MT860 and there is wrote that it supports also DLMS protocol, you can see it at the end of the page.
http://www.telematicasistemi.it/prodotti/MT860
Next week i will do some tests with gurux dlms, thank you for your important support!

Best regards,
Denis.