Thanks to their wealth of experience with Gateways and bus couplers Bihl+Wiedemann offers a variety of 'special solutions' for various coupling requirements. Master simulators not only make it possible to test the Gateway functionality of the ASi Masters, you can also test associated modules without having to write code for complicated controller programs. E.g. the PROFIBUS Master simulator can be used to work with any PROFIBUS modules using any desired .gsd file and even carry out automated checking using Windows dll files, whether the data are cyclic or acyclic.