ACPLT/KS is an open, platform-independent and manufacturer-neutral communication system that is adapted to the concerns and requirements of process control engineering. By means of generic access- and manipulation functions for data and object structures, we have ensured that the interaction between user and communication system is easy to handle. Furthermore, exploration functions allow the integration of new communication members without additional configuration. The specification of ACPLT/KS is freely available to all (for this, see i.e. the documentation in the form of so-called «technology papers») and is maintained by the ACPLT/KS interest group. The interest group is made up of manufacturers, users and academics of the RWTH Aachen together with other research facilities. An open-source implementation of KS-functionalities is available as part of the ACPLT-Runtime System.