Over the years, many rotating exciters have been replaced for static exciters on synchronous machines. As these replacement static exciters age, much of the analog hardware becomes obsolete and can no longer be supported by the manufacturer, again forcing the replacement of the entire excitation system. The successful replacement of the analog controls with state of the art digital technology met the expectations of the project and enabled the generator and excitation system to be commissioned quickly and efficiently with new features to enhance the system’s reliability for many more years of successful operation.