Load on MB300 Network
Thanks for the reply and sorry to bother you..
right now we have 27 Nodes in a redundant network. And all the nodes are loaded to close 85-90%.
When trying to hook up a new controller in the current network, the entire network came down and there was a shutdown. Hence forth we doubt the network loading and would like to examine the same.
Do we have any tools/procedures to know the current load on entire MB300 Network ?
Advant/Master controllers are designed to halt if processor load becomes too high.
If multiple nodes halted with overload (I believe halt code 09 is overload) when adding a new node I would more believe some work procedure (or faulty hardware) caused a network loop that enabled a multicast storm flooding the controllers.
Adding just one more controller does not sound like the most likely cause, especially if the stall occurred when making physical changes to the net.
A halt analysis may reveal more info, but must be done before restarting the controller.
By using the "intelligent" SC520 carrier board (instead of the simpler SC510) in AC450 (or CI547 communication slaves in AC410) the main CPU is offloaded from network tasks, CPU load may decrease by 10-20% and network induced halts will become much less likely.
To be able to say anything more conclusive I would need the info I mentioned in my previous posting (detailed description of physical MB300 installation & components used, ANPER analysis, halt codes, system messages, etc).
"healthy" network load from applications is seldomly a bortle neck in MB300.
My ABB support center unit offers advanced MB300 network analysis. Ask your regional ABB support center to forward a request for offer.
The general recommendation is to keep system load at or below 80% in AC450 and below 70% in MP200/1.
Your figures are higher...
If you are not already using the "intelligent" carried board (SC520) in AC450 or CI547 in AC410 you would benefit from upgrading to these.
If you want a thorough analysis; please contact your regional ABB support center - you may ask them to forward the question to Sweden directly since it regards Advant/Master.
Or, revert here with the details I have requested.