Welcome to the new Schneider Electric Community

It's your place to connect with experts and peers, get continuous support, and share knowledge.

  • Explore the new navigation for even easier access to your community.
  • Bookmark and use our new, easy-to-remember address (community.se.com).
  • Get ready for more content and an improved experience.

Contact SchneiderCommunity.Support@se.com if you have any questions.

Close
Invite a Co-worker
Send a co-worker an invite to the Exchange portal.Just enter their email address and we’ll connect them to register. After joining, they will belong to the same company.
Send Invite Cancel
84488members
353706posts

Transient DNP3 values from SCADAPack 575 analog input

Remote Operations Forum

Collaborate and share knowledge on the extensive range of remote systems and devices, including SCADA radios and RTUs, on the Schneider Electric Exchange Remote Operations (formerly SCADA & Telemetry) forum. From commissioning SCADA integration devices and software, to enhancing existing installations or troubleshooting, connect with a global community of experts and users. Subscribe today.

AlastairF
Lieutenant Lieutenant
Lieutenant
0 Likes
2
555

Transient DNP3 values from SCADAPack 575 analog input

We have a site where there are random transient values appearing against DNP3 points associated with AI objects.

To give an example I have a test setup with a relatively static signal applied to AI5 on a SCADAPack575.

Values recorded by the Geo SCADA and showing in the history are 27.2 but with a transient recorded of 14321773.0, both records are showing against the same DNP3 point at exactly the same time to the ms.

This is generated at the SCADAPack, we can see the source data in the DNP3 traffic sent to the Geo SCADA.

The AI has a 4..20mA input with an engineering range of 0..50. The transient would imply an input of 5,368A which clearly didn't happen.
Has anyone else seen any odd values appearing on AI data?

2 Replies 2
Joel_Weder
Commander Commander
Commander
0 Likes
0
548

Re: Transient DNP3 values from SCADAPack 575 analog input

Hi Alastair,

 

I haven't personally seen anything like this. Perhaps someone else who reads the Forum will comment. If it's sufficiently bothersome it would be best to report it to Tech Support. They see and hear about a lot more odd things happening than most of us. You may already know, but here's their contact details:

 

SupportTRSS@se.com

1-888-226-6876

 

Joel Weder
Remote Operations Specialist
Schneider Electric
BevanWeiss
Spock
Spock
0 Likes
0
530

Re: Transient DNP3 values from SCADAPack 575 analog input

What do you have your zero threshold set to?

I've really only seen the huge number issue when dealing with Modbus mapped values, or where the configuration for the zero threshold / zero value are a bit weird and the analog input is going 'negative' every so often (often happens with flow meters and current readings).

 

What do you have your raw range set to?  And how do you have this point configured? I expect since you've mentioned EU range that you have this configured as a g30v5 REAL value.

 

Are you doing anything 'unusual' in the code? like do you create any DNP3 events using explicit logic?


Lead Control Systems Engineer for Alliance Automation (VIC).
All opinions are my own and do not represent the opinions or policies of my employer, or of my cat..