It has been more than two years since I last discussed flexible function blocks (FFB) in this column, so it is time to provide an update on their capabilities in an industrial setting.

Like all object-based fieldbus function blocks, the FFB is a "wrapper" for the actual functions that reside and execute inside of it. The fieldbus specifications define a set of parameters that must be common to all function blocks to ensure interoperability and communications between the various blocks, devices and host system. Since each component of the fieldbus specification is treated as an object and is, to some extent, similar to a subroutine or function call in a computer program, it is possible for each manufacturer to write its own code for the object to execute, as long as the results are presented in the predefined format. It is this lack of definition for the function itself that makes the FFB possible.

Canada's productivity problem
Manufacturing AUTOMATION recently put together an editorial advisory board consisting of six experts representing different segments of the industrial automation industry in Canada. This summer, we hosted the first editorial advisory board meeting at our office in Aurora, Ont., to discuss trends and challenges in the industrial automation industry. The result was a lively discussion on Canadian productivity, with a laundry list of challenges facing Canadian manufacturers. But there is hope, according to our board members. Before we delve into this deeper, introductions are in order.