What kind of data mapping should be considered for the inter-connectivity between my SCADA and OSI-PI System. My SCADA system is open for OPC.

Please help me if anyone has done the connectivity.

 

PI has very good off-the-shelf interfaces for OPC-DA and OPC-HDA, and a huge reference list of sites using them. The whole point of OPC is that in principle it doesn't matter what sort of SCADA / DCS / PLC system you have. If you are seriously interested in PI or an existing customer then talk to OSI about getting a demo on your equipment.

 

Thankxzz Rob for the information

 

Hello Gan,

Considering that your Scada system supports OPC natively and as the post above OSI-PI supports OPC, you challenge is MAYBE half way solved. OPC Communicate uses a Client-Server architecture. i.e.: if your Scada system is an OPC server and OSI-PI is an OPC server then these two won't be able to talk to each others without the help of a client (or a double headed client). I believe, OSI-PI is an OPC client, but just in case it's not to full solve the problem you need to use OPC Data Manager. Here is a link to the product page:

www.matrikonopc.com/products/opc-data-management/opc-data-manager.aspx

Let me know how it went for you

Thanks,
Wassim Daoud
Global Solutions Architect
MatrikonOPC

 

Hi Gan,

We have numerous SCADA systems talking to PI using OPC. For real-time systems where the SCADA has no historian we typically use the PI OPC-DA Client, whereas if an historian is present with the SCADA system we will use PI OPC-HDA client.

Typically your SCADA system will have an OPC server converting your native PLC protocols to OPC. In the case of Rockwell the OPC server would typically be a flavour of RSLinx i.e RSLinx Gateway.

To do the mapping we would take the SCADA databse place into Excel and then convert it into a PI Tag database format. This means stripping most of the scada tag attributes out and configuring the appropriate PI tag attributes.

Typically the thing to get right are the OPC Topics and how the location codes and point sources are used...also be aware of any scaling conversions that are done in the PLC.

Using excel this way allow us to do a comparison afterwards to easily verify that the PI tags have been correctly mapped to the scada tags.

If your SCADA purports to be OPC compliant you will just need to verify what component is the OPC server and whether you have the product included in your package and have the correct licence to use.

Is shouldn't be necessary to bring in a third party OPC Server unless your SCADA vendor doesn't provide an OPC Server. For an OPC primer refer to the OPCTI's website.

Regards

Graham Burnikell

 

Dear Graham,

How to convert the scada excel database to OSI PI database.... whats the difference between those data base..

 

It is very easy. PI contains an excel add-in tool to import and export between PI and Excel spreadsheets. It is part of the System Management Toolkit (SMT)

Rob
www[.]lymac.co.nz

 

The conversion is straight forward as Rob as indicated, the trick is to be able to understand your scada database in terms of its information and what it means and what this actually means for mapping on to PI.

You will need the PI-SMT toolkit and its Excel add-in, and typically you may have to think about naming conventions and descriptions in order to make the system future proof, a description of H15:3 isn't very informative but its not untypical for systems to have very poor descriptions and incorrect units and ranges.

Regards

Graham Burnikell
[email protected]