BobLfoot

Lesson Learned - Wonderware InTouch SCADA

5 posts in this topic

I am writing this because it is a lesson I just learned after 30+ years in automation and while I was using Intouch Wonderware 10 I am convinced it could have application to other platforms as well.

I received a trouble call that Application B wasn't working on Terminal X, but it worked fine on Terminals Y & Z.  Also Application A would run on terminal X without issue.

I should Point out that both Application A & B connect through a data server to PLCs 1,2,3 & 4.  But Application B also connects to PLCs 5 & 6 as well.

Turns out that an "improvement" project turned off PLC6 as it is being replaced by new PLCs 7 & 8.  And it just so happens Application B was hammering the Data Servers with requests for points from PLC6.  Since the application couldn't get data from PLC6 it hung at that point.  Changing the Data Mode from Always connect to On Active connect let Application B work just fine.

Too bad it took me 2 hours of log snooping to find that one radio button could fix a "broken" application.

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2 hours ago, BobLfoot said:

using Intouch Wonderware

My condolences.

{ /snark. Ignition fan-boy here. }

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Nice write up, thanks.   

Changes over time . . . .

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17 hours ago, Ryan Griggs said:

Where would I find this option?  Thanks!

When you define an Access Name there should be two radio buttons near the bottom for "Advise All items" or "Advise Active items"

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