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01/25/2022
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Hello, my fellow OPC brothers and sisters,
I come to you with great sorrow ;).
I try to read the alarms from a S7-1500. The alarm type is a SimaticConditionAlarmType (ns=3;s=1805 / ns=3;s=1804). This is a descendant of the AlarmConditionType so they say.
As template I use from the Sample-Application/UA Quickstart Application/ the AlarmCondition Client.
The good things first I receive messages, but I don’t receive the additional attributes which are specified in the Siemens typ.
I looked already with wireshark if these attributes get send from the controller, negative. In the combination with wireshark an UaExpert I found out I have to tell the Controller, somehow, that I’m interested in this Attributes. As soon I check them in my filter the Attributes get send.
So, it looks to me I have to add my interests to my Subscription/Filter somehow. I found the promising Methode ConstructSelectClauses in the FilterDefinition class. But with all combination I added I failed.
Does anybody know how can I do this?
Big thanks in advance!
05/30/2017
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If an event has custom properties you need to specify the additional properties in the select clause of the filter.
The select clause takes a sequence of browse names starting from the type.
Note that the browse names include a namespace index which will be different for the custom properties.
Try using UAExpert and verify that you can get the custom properties in UAExpert to make sure there is not a server problem.
01/25/2022
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Hello Randy,
thanks for your quick reply. I checked it already with UaExpert and there it is working.
[Image Can Not Be Found]
With UaExpert I found out that the NodeID of the SimaticAlarmConditionType ist (ns=3;i=1805)
[Image Can Not Be Found]
Thats why I tried to add this nodeId to the filter
[Image Can Not Be Found]
private FilterDefinition m_filter;
…
// must specify the fields that the form is interested in.
m_filter.SelectClauses = m_filter.ConstructSelectClauses(
m_session,
NodeId.Parse(“ns=2;s=4:2”),
NodeId.Parse(“ns=2;s=4:1”),
NodeId.Parse(“ns=3;s=1805”), //<– This one I added
ObjectTypeIds.DialogConditionType,
ObjectTypeIds.ExclusiveLimitAlarmType,
ObjectTypeIds.NonExclusiveLimitAlarmType);
// create a monitored item based on the current filter settings.
m_monitoredItem = m_filter.CreateMonitoredItem(m_session);
Have you any Idea what else I have to adjust?
Hope I don’t have to create a own ObjectTypeIds.SimaticAlarmConditionType const. and have to alter the Framework or derive the relevant classes.
No clue how this image upload works, looks everything a bit 90s here.
I trust in your imagination and the relevant code I wrote directly in.
thanks in advance!
05/30/2017
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You need a sequence of BrowseNames – not a NodeId.
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