i want to receive data from an OPC UA Server in my big data environment through nifi, i want to know which file formats does OPC UA Server support to send data?
"Message Formats
OPC-UA supports two message formats: UA Binary and XML."
https://readthedocs.web.cern.ch/display/ICKB/OPC-UA+Summary
Related
I was asked to provide either the OPC DA ProgID or OPC HDA ProgID.
How do I know if my OPC Server is OPC DA and/or HDA Capable? where do I look for these information?
The information is in the server's documentation.
You can also install the server and then use OPC DA / HDA client to browse for servers on the computer, and check if you see it in the list. This will also typically show the ProgID.
You can also install the server and then inspect the Windows registry. There are entries for component categories. OPC Specifications tells you what are the categories (CATIDs) for OPC DA or HDA servers (plus the categories have descriptive names). The entries for the server will be under the respective category, if the server supports it.
There are two types of OPC OPC DA(Data Access) and OPC HDA (Historical Data Access)
When you want to communicate OPC. if you want to catch the Data from the DCS system then you must have OPC DA. or you want to run in simulation mode then Install OPC as server on your system.
Historical Data Access is used for History values and OPC DA is used for Live values.
Prog ID:- You can find the prog-id from your OPC Setting.it is depend on companies which product you are using.Please check below some examples of prog- id.
Kepware.KEPServerEX.V6
Matrikon.OPC.Simulations.1
OPCSystems.NET.1
EEI.OPCSimulator
you can used OPC Expert for searching a OPC Server in your network.
I have worked on Alarms and Events in OPC Classic. I was wondering if there is an equivalent option in OPC UA. I am using Siemens S71512 CPU, which has got a built-in OPC UA Server.
Regards,
Nandgate.
The classic OPC had Alarms and Events, OPC UA has Alarms and Conditions.
This is specified in part 9 of the OPC UA specification. You can get it here
Currently few OPC UA Servers and Clients supports it.
Is it possible to connect an OPC UA server to another OPC UA server, in order to redistribute its data?
In fact, I have a small device which runs a small OPC UA server that exposes some data. The device is running in a private network. Then I have the main OPC UA server accessible from the internet, where I would like to view some of the small device's data, together with some more generic data.
Yes, it's possible, you just need a server that has this feature. It's not a standard part of OPC UA that any server will be able to do.
One option would be to use KEPServerEx's client driver.
OPC UA is a server-client architecture. Therefore, you cannot make two servers talk to each other directly. There must always be an OPC UA client implementation between them. Yes, KepServerEX does support this feature as having an OPC UA Client Driver out-of-the-box. However, you can implement your own little OPC UA client between the servers as a gateway too, which may suit your solution better I believe.
As far as I understand this will be possible by using an OPC UA Aggregation Server as main server (which is accessible from the internet).
You could test it with the open source UA-NetStandard Aggregation Server.
Is there a OPC Historian server in between? where PLC or SCADA connects to OPC UA
Not unless you've put one there.
I think your question needs a lot more information or it's going to get flagged.
I'm trying to access an OPC Server on a Windows Machine using a Modbus Master on Linux and was wondering if that's possible
Not typically. You should use an OPC client.
No. OPC and Modbus are completely different.
Tipically you see an OPC server accessing a Modbus slave. You can model an OPC server as a two-layered component. The "upper" layer talks OPC with OPC clients. The "bottom" layer talks whatever protocol you want (in this example Modbus). The server's main task is to move data through these layers.