Emerson Exchange 365

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Continuous Historian on HMIs

We have recently hit the limit of what our continuous historian can monitor on the ProPlus; all 255 variables are being used. I spoke to a technician and was told that it is possible to have the historian available at each of the three HMIs we have on-site. Each HMI historian can monitor another 255 variables without having to pay for another historian license. After talking to the technician, he said it would cost about $1000 to come out and put the historian on the other HMIs (my facility is in rural west Texas), so naturally I turned to looking to solve the problem on my own. Does anyone have any experience they would be willing to share regarding this matter?

I apologize if this has been asked before, I was unable to find the answer I was looking for.

P.S. Just went out to the HMI and tried to open the Continuous Historian and was given this message:

"SQL Server does not exist or access denied.

ConnectionOpen (Connect()).

Invalid connection string attribute

Possible reasons include: the Event Chronicle is not enabled; the Data Server does not exist or can't be reached; the Dataset does not exist; or the workstation has not been assigned to the Event Chronicle license.

The attempted Data Server and Dataset were:

OWS2

Ejournal"

OWS2 is the name of the HMI that I was working on. Anyone have any idea how to enable the Event Chronicle, reach the event chronicle, or assign the workstation to the Event Chronicle license on an HMI that is not the main ProPlus station?

• HMI
• Continuous Historian
• Delta V
• Historian
• continuous
• DeltaV

matthew.carlin

• 21 Mar 2017 6:40 PM
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4 Replies

• Bob Halgren

  

  • 21 Mar 2017 6:51 PM

  Hi Matthew,
  
  Each DeltaV Operator Workstation comes standard with a 250-point DeltaV Continuous Historian, so yes, you can do this. The drawback is that data would now be available in multiple places in your system, which may present some challenges depending on what you want to do with it after it is historized.
  
  For more information on the DVCH, you can take a look in the Product Datasheet: www2.emersonprocess.com/.../DV_COL_PDS_ContinuousHistorian.pdf and the FAQ document: www2.emersonprocess.com/.../DV_WP_Continuous_FAQ.pdf
  
  If you find yourself needing significantly more than 250 tags to be historized, I would suggest putting a larger DeltaV Continuous Historian on a DeltaV Application Station, where you can scale up your historian to as large as 30,000 tags (we have multiple licensing scale-ups available, so you can reasonably get it as small or large as you need it to be). If you decide to go that way, your LBP should be able to help you with selecting the right option based on your needs.

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• matthew.carlin

  

  • 21 Mar 2017 7:42 PM

  In reply to Bob Halgren:

  Bob,
  
  Thank you for the information, the product datasheet was especially helpful. I am wondering if you know the specifics of how to set up the historian on the HMIs?

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• Andre Dicaire

  

  • 21 Mar 2017 7:55 PM

  In reply to Bob Halgren:

  DeltaV History collection is configured at the module level, but assignment to the continuous historian of a workstation is done by Plant Areas. The History collection of the plant Area is the aggregate of all the modules in that Plant Area. The History tags collected by the historian is the sum of the plant areas.
  
  To accomplish what you want, you'll have to make sure you segregate the Modules in different Plant Areas that you will then assign to different Continuous Historians on different workstations. You must keep the total number of assigned tags below the 250 limit. For Operator span, you could assign all the Plant Areas to the Alarm and Event container. This allows you define a wider span of control than the Continuous Historian.
  
  If you later decide to add a Historian to collect all history in one place, you'll simply be able to assign all these areas and not have to worry about reassigning them.
  
  As pointed out Bob, your operators will have to know which console to connect PHV to view certain history data. I've not tried this, but in v12, you can use the embedded Trend, where each can be configured to look at a history tags from a remote Continuous Historian server. A single display could show 50 values or maybe more. So rather than call up PHV and change the history server, call up the display.
  
  If you have v11 or earlier, this is not available to you.
  
  I would strongly recommend you move to an Application Historian as managing history across operator stations can be time consuming, and Operator's may get frustrated with selecting the right host for desired data.

  Andre Dicaire

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• matthew.carlin

  

  • 21 Mar 2017 8:07 PM

  In reply to Andre Dicaire:

  Andre,
  
  The operators do not have access to the historian, and our facility is too small (about 4 acres, most of which does not contain equipment) to warrant an Application station as we only have 3 HMIs that are all relatively close to one another. You replied as I was typing an addendum to my original post and I believe my problem could be fixed by figuring out which of the "Possible reasons" is the culprit and solving the issue. If you have any information on how to figure this out I would appreciate it.

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