800xA 6 Advant OPC DA overloaded
Hi all.
We have a mixed AC800M and AC400 project with two(2) aspect servers and two(2) connectivity servers (ADV1, ADV2). The connectivity servers are connected to the MB300 network using two(2) PU410 boards. Third-party OPC client applications are connected to our system using "OPC Surrogate" (about 5000tags in total). In rare occasions, we get the following errors
If we restart the redundant server (i.e. ADV1) everything goes to normal. Why? Is there anything I can do or check? I guess this has to do with the overloading of PU410 (but the PU410's load is very low)?
Regards
Best Regards
We have a mixed AC800M and AC400 project with two(2) aspect servers and two(2) connectivity servers (ADV1, ADV2). The connectivity servers are connected to the MB300 network using two(2) PU410 boards. Third-party OPC client applications are connected to our system using "OPC Surrogate" (about 5000tags in total). In rare occasions, we get the following errors
If we restart the redundant server (i.e. ADV1) everything goes to normal. Why? Is there anything I can do or check? I guess this has to do with the overloading of PU410 (but the PU410's load is very low)?
Regards
Best Regards
Asked 4 months ago
Voted best answer
3
The MB300 OPC DA server is sensitive for clients not adhering to the performance guidelines.
In short:
- subscribe, do NOT scan items
- only subscribe for properties WITH support for cyclic subscription (see 800xA for Advant Master Configuration User's Guide appendix)
- use 1, 3 or 9 second rates ONLY. 60 seconds is worse than 9 seconds!!
- write as little as possible and ONLY to MB300 DAT objects
- if audit operator action is required, exempt external writers by steering them to the OPC DA Surrogate which can bypass audit if a registry key is set
I have attached a document which can help you to inventory the clients to the MB300 OPC server. If you provide data, I will comment. Make two runs of the "OPC DA Connector - Statistics" operations (MasterAdapter + Connector) with a 1 hour delay in between.
Some improvements have been implemented. Read the 6.0.3 and 6.1 release notes. Be sure to be on the latest available rollup of 800xA for Advant Master.
In short:
- subscribe, do NOT scan items
- only subscribe for properties WITH support for cyclic subscription (see 800xA for Advant Master Configuration User's Guide appendix)
- use 1, 3 or 9 second rates ONLY. 60 seconds is worse than 9 seconds!!
- write as little as possible and ONLY to MB300 DAT objects
- if audit operator action is required, exempt external writers by steering them to the OPC DA Surrogate which can bypass audit if a registry key is set
I have attached a document which can help you to inventory the clients to the MB300 OPC server. If you provide data, I will comment. Make two runs of the "OPC DA Connector - Statistics" operations (MasterAdapter + Connector) with a 1 hour delay in between.
Some improvements have been implemented. Read the 6.0.3 and 6.1 release notes. Be sure to be on the latest available rollup of 800xA for Advant Master.
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