Need DNP 3.0 library

RodriguesLeo · Joined: 24 Dec 2020 Posts: 3 Location: RJ-Brasil

Dear forum,

I need to add DNP3.0 communication in an existing equipment.

Does anyone do this work or do you have a CCS or ANSI C library tip for this development?

The controller is PIC18F4620 and has 70% of the memory available for this implementation.

Thanks
_________________
Eng - Powerbras
leo@powerbras.com.br

Ttelmah · Joined: 11 Mar 2010 Posts: 19490

Big question. Over what physical layer?. This makes an absolutely enormous
difference to the code.
For a master, or an outstation?.

The open source code that would probably translate the easiest, is:

<https://sourceforge.net/projects/dnp3-source-code-library/files/

This includes Windows development tools and is built for a Linux
type environment. Since most of the CCS libraries actually emulate the
Unix/Linux versions, it should be relatively easy to translate the parts
needed.

temtronic · Posted: Tue Dec 29, 2020 5:53 am

I just 'had' to lookup DNP3. Seems it's yet another multilayered serial communications protocol.
It'd be interesting to know what the 'overhead' is to send 1 byte of data from one RTU to the HOST. Also how BIG the code inside a PIC would be to do the job.
Just curious....

Ttelmah · Joined: 11 Mar 2010 Posts: 19490

The basic protocol for a slave over serial is not too hard to do. Very similar to
ModBus. However if he needs to use it over ethernet, the total size will
be getting very large.

RodriguesLeo · Joined: 24 Dec 2020 Posts: 3 Location: RJ-Brasil

I have a device that operates in power substations and are not accepting Modbus, I need to communicate in DNP3 just to transmit some analog, status and receive commands.

It would be an IED with RS485 serial.

I found a library to sell for 9000 U$D, impractical for me.

I'm studying this one that you indicated.

I will share it here if I can finish this mission.

It's been more than 10 years since I accessed here and I found some fundamental tips when I made my Modbus library, for my despair CCS includes one in the compiler right after I finish mine.

Thanks.
_________________
Eng - Powerbras
leo@powerbras.com.br

temtronic · Posted: Wed Dec 30, 2020 9:16 am

Ttelmah · Joined: 11 Mar 2010 Posts: 19490

I would honestly look at something like this:

https://www.neteon.net/moxa-mgate-5109-1-port-modbus-rtu-ascii-tcp-to-dnp3-serial-tcp-udp-gateway-0-60-c

RodriguesLeo · Joined: 24 Dec 2020 Posts: 3 Location: RJ-Brasil

Thanks for the tip!

I'm using a Brazilian similar of Enautec temporarily, www.enautec.com.br but it's still expensive for my application.

I'm at a disadvantage with a competitor and I need to have this protocol in my firmware.

att,
_________________
Eng - Powerbras
leo@powerbras.com.br