Microgrids (MGs) provide numerous advantages to the power system network in terms of renewable integration, flexibility, and reliability aspects. This chapter focuses on the importance of secondary control in microgrid operation and application functionality. A droop-based distributive secondary control technique is developed for microgrid system. Care is taken to ensure that the plant complies with all grid codes, incorporates emergency grid support, and can therefore function in both grid-connected and standalone modes when devising specific control algorithms. The IEC61131-PLC programming language is used to model the field assets for case study, which consists of two generators, PV, and energy storage system unit that is connected to the grid. The operation is validated and analyzed under various uncertainties inherent in real-world operating conditions, with consideration given to grid transitions and grid management for import and export to the grid, should the need arise. The chapter gives an overview about the actual industrial control implementation using real-time controllers and focuses on the testing and validation of common applications of MGs using real-time industrial test bench.