IndexedPersistentStaticExists

Description:

This method checks to see if the specified inter-frame data exists, which is true only if it has been encountered in any decoder in any frame so far. In the case of the IndexedPersistentField, it checks to see if the index value is good. It returns TRUE if the value is good and FALSE if the value isn't there. This is useful in cases where you have saved a field value with an index, but the index field hasn't been encountered yet. Using the example from the StoreIndexedPersistentField method, this method would check to see if a command to the central specified in the parameter has been seen. If not, you can do something appropriate.

Parameters:

Example:

FIELD retrieve_type (Fixed 0) IF (IndexedPersistentStaticExists usb_type_with_address frame_ address) RETRIEVE (IndexedPersistentField usb_type_with_address frame_address) (TABLE types) SUPPRESS_DETAIL