Alarms in 800xA with GUID names and no description
Hello Stefan. A while back you responded to my question concerning alarms in 800xA/Advant showing the GUID name in the list........now the problem has returned ;-) I have one specific alarm in the system that I can not get rid of. The Lost and Found folder is empty - apart from one aspect called LAN???? - and when I enter the object name in the search function there is no result. The object works perfectly when selected on the display except for the alarms. The 800xA system is ver 4.1 and in your previous answer you mentioned about restarting the event system......could you explain how I do that. And if you have other comments please don't hold back ;-)
The sole purpose of Lost and Found is to host alarm and events for objects not existing in the system
Don't be too eager to delete objects in Lost and Found before you have found the reason for it to be created. If you delete before sorting out the problem; a GUID larm will be the result since deleting the object will delete its name; and the only thing that the system have then is the GUID which will be shown in lists.
To quickly find the object behind any alarm; use the context menu and select one of the structure references (which of course will not be there if you have deleted the object)
The LAN alarm is probably belonging to AC400 Connect. I believe LAN was missing in the SV4 version (most [all?] other AC400 system alarms have been injected below the AC400 System Event Names object in the Control Structure).
I believe you should drag your LAN object there to create a permanent residence for it.
I'm not in office this week and can not verify the restarting procedure as much as I would like to do before writing here.
Alarms may be buffered by the OPC AE server process they emerged from and also the Event Collector service in 800xA; by restarting one or both of them, you will empty their buffers. Some OPC AE servers can refresh from the controller, e.g. AC800 OPC server can refresh alarms from the controller. Hence; the final buffer to clear for some connects is the controller itself.
AC400 alarms are a bit special since it they does not support refresh until SV 6.0; without refresh, the Alarm Manager will not attempt to refresh, instead it will keep all alarms even if the Event Collector service is restarted.
I suggest that you:
- delete the alarm you can not get rid of (delete in alarm list).
- drag the LAN object and drop it on the AC400 System Event Names object
- wait for the problem to repeat itself; then find out the origin of the alarm before deleting the Lost and Found object