Emerson Exchange 365

Yokogawa GSGW opc client connection with Deltav opc server

I am trying to connect deltav opc server with yokogawa gsgw opc client without much success. Deltav opc server and yokogawa gsgw opc client are two different computers. I had followed the required DCOM settings on both machines without getting result. How can this opc connection between deltav server and yokogawa opc client be achieved.

• deltav opc third party

Obinna Obioji

• 12 Mar 2017 8:25 AM
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4 Replies

• Werner Van de Vijver

  

  • 12 Mar 2017 11:59 AM

  If you need to communicate between two computer in a Domain or especially in a Workgroup environment you better use an OPC tunneler, Marktricon, Kepware, ... This will simply installation and settings as DCOM is an nuisance.
  KR, Werner

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• AdrianOffield

  

  • 13 Mar 2017 5:49 AM

  I assume you are implementing using OPC Mirror with mirror loaded on DeltaV Side? To make it work, I would suggest installing OPC Remote on the Yoko client PC (this creates the DeltaVAdmin user, used in OPC async callbacks). Then you'll need a user e.g. OPC_USER that DCOM will interface as. Create this user in DeltaV, local app station and remote client PC. Make sure it is part of the Windows group 'Distributed COM Users' and is part of the DeltaV Access group. I would assume you'll need to do something similar on the yoko client side to allow OPC_USER access to the gsgw opc data.
  
  To test, login as OPC_USER and run OPCWatchit to see if you can access DeltaV and Yoko, if it works you can configure OPC mirror to map data between the two OPC clients. Make sure to set the OPC Mirror service to run as OPC_USER.
  
  Can be a pain to get working, but it does work :)

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• MPHymel

  

  • 13 Mar 2017 12:48 PM

  In reply to AdrianOffield:

  We use a third party product, Cogent DataHub. As KRW mentioned it is a tunneling product. We run it on a Yokogawa engineering station. The DeltaV OPC remote is also installed on this machine. We purchased the OPC bridging option when we bought the Cogent DataHub. It is very easy to configure OPC tags for either DCS system, and very simple to make bridging assignments. Just be aware that if you are performing OPC writes to Yokogawa, they may be logged as tuning parameter changes in your event log, and these can become a problem if you are passing a lot of data in this manner.

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• Obinna Obioji

  

  • 16 Mar 2017 3:22 PM

  Thank you Werner for your idea, actually I don't have the option of using the applications you mentioned. I was able to establish the communication between yokogawa with deltav with dcom settings using opc remote . Thanks 

  
  

  Sent from my BlackBerry 10 smartphone.

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