I have a Honeywell PHD source system. I have a got a suggestion to use Cognite OPC Classic Extractor. But I can see Extractor suggested is beta version. Can I know, it is efficient to use the Cognite OPC Classic Extractor, or we should go with custom extractor.
If we use ,Cognite OPC Classic Extractor it connects over COM+ or DCOM to OPC servers and streams live and historical data into CDF. Can you please elaborate on COM+COM+ or DCOM connectivity to OPC Servers.
How to connect with Honeywell PHD server using either of the ways?
Thanks
Best answer by Einar Omang
I don’t know for sure. My googling seems to only indicate support for OPC Classic, not OPC-UA. Presumably you have access to the source system and related documentation and are better placed than me to determine what it supports and doesn’t support.
It looks to me like OPC Classic is how you connect to Honeywell PHD. If so, then are you sure that applications connecting to it aren’t already using COM/DCOM? You can use COM+ or DCOM safely provided you make sure to run it on an isolated network, using a dedicated user with limited permissions.
Can you please provide more information what is meant by to connect over COM+ Or DCOM if you have any references?
As per the minimal yml configuration in OPC Classic Extractor the like server requirements, endpoint url, da version, hda version) provided in the file will be sufficient to connect to the Source system if, not please provide details of required configurations to connect with Honeywell PHD system.
I would like to know the following details as well.
You mean to say my Extractor and the OPC server should run on the same machine?
If I installed the OPC Classic Extractor in my PC, how does it actually connect to Honeywell PHD source system is it , through OPC server. If, yes where to install the OPC server in Extractor PC or source system.
As part of minimal configural yml what exactly da-version version and hda-version means.
If you have a server on the same machine, you should be able to configure the extractor quite easily with little extra work.
When connecting to an OPC Classic server with both live and historical data you are technically connecting to multiple different servers. You need to tell the extractor which interfaces on the server to connect to. You will need to look up what versions of DA/HDA your server supports.
If the server supports OPC-UA then they can use that. I’m not familiar with the source system.
If the server only supports OPC Classic then there is no way around DCOM. It is indeed insecure, but that’s the consequence of using technology that was deprecated over a decade ago.
I don’t know for sure. My googling seems to only indicate support for OPC Classic, not OPC-UA. Presumably you have access to the source system and related documentation and are better placed than me to determine what it supports and doesn’t support.
It looks to me like OPC Classic is how you connect to Honeywell PHD. If so, then are you sure that applications connecting to it aren’t already using COM/DCOM? You can use COM+ or DCOM safely provided you make sure to run it on an isolated network, using a dedicated user with limited permissions.
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