Find Your Pitfalls: Using a FEED Study to Efficiently Perform Legacy Control System Code Conversions
When it comes to plant floor control system software upgrades, the path of least resistance can seem attractive. Many PLC and DCS manufacturers offer automatic code conversion software tools to upgrade from one generation of controller to another or even from manufacturer A’s platform to manufacturer B’s. This method can certainly reduce the time to get to installation, but the code carries with it all the baggage that the system has been saddled with over the years. This can include dead and defunct code from portions of the operation that no longer exist or functions that never worked quite right for which the operators have a long-standing, and completely undocumented, work around.