DNP 3 IP - "Reset Link Failed!" alarm

tom_buzink

Hi - I currently have a MangoES set up with a DNP3 server (using IP). It has been working OK, however recently I get an alarm "Reset Link Failed' alarm, even though it seems to be merrily responding to polling and not reporting any other errors.

I think the alarm is related to the fact that none of my points updating (show old values from months ago and don't respond to fresh values). Can I force a reset of the link?

Thanks.

phildunlap

Hi Tom,

The link will be reset when the data source starts up, but that's the only place the DNP34J's DNPUser.resetLink() method is easily invoked. So, stopping the data source and starting it again. If you're seeing this while the data source is running, then I suspect it is not polling as merrily as you suggest. It would suggest it is getting some exception when polling the points, and so it is determining it isn't initialized and it tried to reset the link during initialization.

tom_buzink

Hi Phil,

Thanks for that. I tested some more and it seems related to the port I was using. The Mango is being a second DNP3 master and I used port 20002 (the other Master is using 20001). I'll investigate what ports both masters can use - unfortunately the slave device needs separate ports...