Persistence Channel A persistence channel defines the storage settings for one or more groups of persistent variables. It can be added to a Persistence Manager node by use of the command Add submodule

Module: Data Storage The submodule Data Storage defines the storage format of a persistence channel . . Choose one of the following storage formats: ASCIIFileStorage : Saving the values in ASCII forma

_VAR Example 4 . Example

Data Storage The storage of persistent variables can be triggered in various ways: Each persistence channel provides an application interface which can be used by the application to trigger a storage

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Data Access The Persistence Manager provides up to 10 submodule instances of type PersistenceChannel. Each persistence channel provides a submodule instance of type DataStorage which is responsible fo

Diagnosis Each persistence channel has a submodule which allows data access (interface IDataStorage ). The following outputs provide diagnostic information: Output Data Type Description xActionOngoing

Error Handling Error numbers and the related strings are called or acknowledged by means of the standard module interfaces ( ClearErrors , FirstErrorNumber , GetFirstErrorMessage , LastErrorNumber , G

DataLog Manager The DataLog Manager is a standard component of the Application Composer. It serves for cyclic storage of variable values into a file. These variables are flagged with special attribute

Module: DataLog Manager The DataLog Manager manages the data logging of variables. It can be added to the module tree below the upper most object . This is done by the Add Toplevel Instance command an