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showing max value (out of 7) only ? Options · View
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Joep
#1 Posted : Thursday, December 08, 2011 5:02:41 PM
Rank: Newbie
Groups: Member

Joined: 2/27/2011
Posts: 4
Hi all,

i'm encountering a new challenge in building my HMI screen. On this screen i have two rows of (scada imported)temperatures, something like this:

South North
927 906
923 912
902 907
931 928
934 923
933 884
925 935

On the HMI screen i build 2 times 7 bars showing all these temperatures, BUT in fact i'm only interested in the highest values (from south 934 and north 935).

In excel i know the way to show this value, but in Processbook i really can't find if it's a build in or to-do-with VBA.

Anyone has an idea?

Regards,

Joep
Netherlands
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RJK Solutions
#2 Posted : Thursday, December 08, 2011 8:20:54 PM
Rank: Administration

Groups: Administration

Joined: 6/20/2008
Posts: 617
Location: Cheshire, United Kingdom.
Hi Joep.

You can still check for maximum value from a bunch of PI tags, values or a mix of both.
For example, let's say you always want the maximum value of 7 tags you would create a ProcessBook DataSet with the following expression:

Max('south:temp1','south:temp2','south:temp3:'...'south:temp7')

Only thing you will struggle to do is identify the name of the PI tag that is returning the maximum value via the dataset route.

Hope this helps for now...
Principal Consultant
Real-Time Data Management @ Wipro Technologies
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