COSYM – Co-simulation platform

COSYM (CO-simulation of SYsteMs) is the powerful simulation and integration platform from ETAS. It makes it possible to test and validate software at system level in the early phase of its development, when readying it for deployment in production (virtual ECUs). COSYM supports all stages of ECU software development and works on a wide variety of platforms.


COSYM simulates automotive bus systems on the level of real bus communication, the frame level.
  • Enables integration of function and plant models from a broad array of modeling tools
  • Straightforward integration into existing development environments through REST-API to address specific use cases, e.g. the deployment in a continuous-integration process
  • Integration and combination of discrete-time and continuous-time systems
  • Support for early validation of new functions in a closed-loop scenario
  • Openness: support for specific standards, such as the Functional Mock-up Interface (FMI) and ASAM XiL