OPC Server 800xa Version 6.0.2

Hi everyone!

I would like to know how OPC Server (

ABB.AfwOPCDaSurrogate.1) really works.

For exemple - I want to collect some data from OPC Server, so I acess

ABB.AfwOPCDaSurrogate.1

to find the opc tag.

If I colecte around 10000 opc tag. What is the best configuration to have a good performece from opc server ? (Scan Group, number of Group...)

If I set two groups, one with 5000 opc tag and scan 5 seg, and another group with 5000 opc tags with 5 seg, is the same if I configure only one opc group with 10000 opc tag with scan 5 seg ?

How many OPC Group is recommend create ?

Wich scans is better to the OPC server?

Thank you in advance!


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Gustavo   

asked 2 months ago
Closed



Best Answer

1

The performance is to 99% depending on the source OPC server.

If you tell me what PLC / OPC server you are reading from I may be able to tell more.

In general, Advise() based asynchronous subscriptions are the most lean while scanning subscriptions ReadAsync()/ReadSync()/Refresh() have significantly much more overhead.

See attached PDF file.

Some OPC servers like 800xA for Advant Master are extra sensitive for the "dialect" the OPC client is using. With 800xA for Advant Master, always use Advise() based subscription, or ReadSyncFromCache(not device) with active OPC groups and items with update rate of 9000 ms.

 OPC client function .pdf

Stefan Stromqvist   

answered 2 months ago


 


By Gustavo on 8/7/2017 | Like (0) | Report

Thank you for your time !

I am reading from OPC Server. (800xA System Version 6.0.2) For exemple, when I open Matrikon I add the IP where OPC Server is located. So when I connect, I look for ABB.AfwOPCDaSurrogate.1. Then I add OPC item.(xxx:HSI.MV, etc)


By Stefan Stromqvist on 8/8/2017 | Like (0) | Report

Please describe further what you mean with OPC Server?

The DA Surrogate (out-of-proc with DCOM support) and DA Server (in-proc) are only a façade (or relaying agents).

Unless you plan to read from internal properties (General Properties, SoftPoints, Alarm Global Properties, etc.) your client will interface with something begind the surrogate.

What PLC are you planning to read from?

- AC400
- AC800M
- AC800F
- AC870P
- AC500
- MOD300
- Other ABB PLC
- 3rd party PLC
- etc

Each of the above PLCs have a dedicated OPC server which will be the *real* source for your OPC DA client.

As an application engineer you should find out the specifics about the *real* OPC server you are pulling or pushing data from/to - there are pitfalls and performance recommendations that you should be aware of.


Add New Comment


Answers

1

The performance is to 99% depending on the source OPC server.

If you tell me what PLC / OPC server you are reading from I may be able to tell more.

In general, Advise() based asynchronous subscriptions are the most lean while scanning subscriptions ReadAsync()/ReadSync()/Refresh() have significantly much more overhead.

See attached PDF file.

Some OPC servers like 800xA for Advant Master are extra sensitive for the "dialect" the OPC client is using. With 800xA for Advant Master, always use Advise() based subscription, or ReadSyncFromCache(not device) with active OPC groups and items with update rate of 9000 ms.

 OPC client function .pdf

Stefan Stromqvist   

answered 2 months ago


 


By Gustavo on 8/7/2017 | Like (0) | Report

Thank you for your time !

I am reading from OPC Server. (800xA System Version 6.0.2) For exemple, when I open Matrikon I add the IP where OPC Server is located. So when I connect, I look for ABB.AfwOPCDaSurrogate.1. Then I add OPC item.(xxx:HSI.MV, etc)


By Stefan Stromqvist on 8/8/2017 | Like (0) | Report

Please describe further what you mean with OPC Server?

The DA Surrogate (out-of-proc with DCOM support) and DA Server (in-proc) are only a façade (or relaying agents).

Unless you plan to read from internal properties (General Properties, SoftPoints, Alarm Global Properties, etc.) your client will interface with something begind the surrogate.

What PLC are you planning to read from?

- AC400
- AC800M
- AC800F
- AC870P
- AC500
- MOD300
- Other ABB PLC
- 3rd party PLC
- etc

Each of the above PLCs have a dedicated OPC server which will be the *real* source for your OPC DA client.

As an application engineer you should find out the specifics about the *real* OPC server you are pulling or pushing data from/to - there are pitfalls and performance recommendations that you should be aware of.


Add New Comment



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