MOD300 OPC server load
How can we check the actual load of an MOD OPC server?
is There any tool available?
The CPU load of the OPC server software itself is not typically a problem.
The bottleneck in a MOD300 system is the RTA Board, or the DCN interface cards on SC Controllers.
Check the CPU load on the RTA board using the MOD diagnostic displays. Also check the load on each of the MOD controllers and multibus nodes. Then temporarily close all operator displays and stop the history services in the connectivity servers. Compare the CPU loads on the RTA boards.
Opening a graphic creates a new DCN subscription list, which the controller nodes must create and this can substantially increase CPU loads for a few seconds while the list is being created. The graphic will show OPC errors until the list is created and data is returned from the controller. One solution we used at a site with older SC and Model B controller nodes, was to keep every operator graphic allways open. The workplaces take a while to start up, but the CPU load on the controllers is much reduced.
Thanks for the replies,
the concern is with a MOD 300 OPC server, in the customer's site there are two of them, one working properly and the other one not, we reinstalled it and upgraded to latest version, so now the idea its to see how how load can handle now.. 800xA MOD connnectivities are fine..