How can “trend” and “view” objects be created?
A view is a collection of data values from various sources, arranged for remote access. This function is performed by standard communication function blocks. A trend is a sequence of data values from the same source. The function of collecting trend data can be implemented as an algorithm of a basic function block, and remote access to the data so collected can be provided by standard communication function blocks. See Annex C of IEC 61499-1. • Is there any way to distinguish between “process events” and “execution scheduling events”? These events can be distinguished from each other by the new event type mechanism. These can be used by software tools to show only the event types of interest. • Why are there no GLOBAL or EXTERNAL variables? All variables are encapsulated. There is no guarantee that there will be an implicit global distribution mechanism available. When such mechanisms are available, they can always be mapped to service interface function blocks. • What is an ECC? Why s
