As processing power, networks and graphics evolve in industry 4.0, the industry is given more and more powerful tools to perform simulations and testing in a digital environment for robot cells and their control systems. The simulation of production cells together with their intended control systems has opened a discipline called virtual commissioning (VC) that has become more popular as hardware and software are getting increasingly better. In this thesis a production cell already commissioned, and running are investigated. The company Graniten AB produces automated packaging cells, they have wishes about being able to benefit more from virtual validation of intended solutions. One of the company's unique selling points is that they make packaging cells that are extremely fast, which leaves little room for change as it affects the takt time in the cell. To see if VC is possible for Graniten AB, the work will be carried out using RobotStudio for robot-simulations and Twincat for the PLC-Control program. The experiment compromises of attempting full VC of the cell using a Reconfigurable Manufacturing System (RMS) approach. This is to see if it is possible to validate the PLCcontrol-program and verify takt-time in. The results are that some programs in the PLCcontroller are not possible to simulate in the simulation-tool used. Using the RMS-approach proves useful as but future time-gains when it comes to future recommissioning needs to be investigated.