Is the Alarm/Trend template on a base protocol inherited from the device protocol?
For example, these two parameter have alarming and trending enabled on the device protocol:
When switching to the mediation layer the correspondent base alarm parameter shows the parameter in green so it seems to know the alarm template:
For the trend it show the icon of trending enabled but when clicking on it, the graph is empty:
Indeed, the monitored state next to the parameter (when using the mediation layer view) is defined by the underlying alarm template.
I would also expect that the trending can be viewed through the mediation layer view. So, at first sight this seems to be an issue.