MB300 Network problem in AC450
Sometimes we lost the dynamic data in 800xA from one AC450, we have anothers AC450, but this only one has this problem. I have looked the message log and i found one message about task CXAA000, i understand this message is about datasets, could this error cause the lost in data in AC450? I do ANPER command and this task is <1% in controller and there is no full events in its channel.
No alarms in system alarms.
Thanks in advanced.
Agree with Rob.
Dataset traffic between controllers does not have much in common with the data subscriptions made from 800xA RTA/PU410 to controllers other than that they share the same control network bus (MB300).
Internally they are using different "transport connections" and also different "priority" to further isolate the traffic (the MB300 protocol follow the OSI layer model - https://en.wikipedia.org/wiki/OSI_model)
Try to capture system messages *while* the problem is present;
- have Online Builder connected to controller via serial cable (to front of CPU)
- have RTA Board Maintenance open on 800xA connectivity servers for MB300 networks
A common (and probably unrelated to the HMI data loss) problem with dataset is that someone has queued more than two (>2) sending datasets to the same destination node and using the same scan factor. A rule of thumb is; max two sending datasets per node and scan factor.
If you have inserted the full system message (incl all details) I could have been more specific.