can't view signals trends on 800xa
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Before any logging can take place the log configurations need to know where to obtain the data.
Just as 800xA has services to provide alarm and event functions, there is a service for collecting history. It is called the Basic History service and the responsibility is to acquire and make available data for logging. It communicates with the OPC Server to obtain the data coming up from the controller.
The situation is similar to other service set-ups. The Basic History service is defined in the Service Structure. This service may serve one or more History Service Groups. We will have additional service groups if there are multiple Connectivity Servers whether they are for AC 800M, Harmony, or other connectivity types.
The Basic History service gets installed and configured automatically during system creation. Unless further service groups are required there is no work to be done in the Service Structure. If we have redundant Connectivity Servers, there will be two service providers in the Basic service group.
Before logging of properties can take place in any structure at least one History Source aspect must be defined. This is done at a fairly high level in the structure. All objects that are descendants (children) of the object containing the History Source aspect inherit this source.
The History Source aspect is required to point to the service group which will be used for all log configurations.
For logging from data inside objects in the Control Structure, it is usual to set up the history source as an aspect of the Control Network, and then all objects below it will use this history source.
1. Mark the Control Network object in the Control Structure.
2. Add an aspect of type History Source to the Control Project and name it History Source.
3. Open the “Config View” for the History Source aspect.
4. Select the service group Basic from the list of the available service groups. This service group is defined in the Service Structure > Basic History > Basic as explained above.
5. Click Apply.
@Admin: I'm not able to add images in the comment box for the answers given first.
Could you please look into that.
If you could say which history you are using to view the trend. Is it basic history or IM history or 800xA history, It will be straight forward to answer.
Please configure the history source accordingly at the node level or application level or as per the requirement in control structure.
Check the service group and service provider for the hsitory source is in service state.
Check all logs are in active state.