MEN: software package for safe train control system menTCS

The MEN Train Control System menTCS is an open computer platform for automated train operation and protection. With the programming interface Y-COM, which is now available, users can rely on a complete software package, partly with SIL 4-certified components.

menTCS is a modular computer platform developed for safe control of all safety-critical functions in rolling-stock and wayside applications. The system is functionally safe and SIL 4-certified due to its two redundant control processors, which communicate with a dedicated I/O processor and thus also with additional external systems. The new Y-COM programming interface unites the commands of the two control processors and thus – despite redundancy – enables an easy communication between the control and the I/O level. 

Y-COM is a BSD-socket-based API (Application Programming Interface) integrating well-proven open source technology into a safety-critical environment. Y-COM itself complies with SIL 0 – but by communicating via a safety protocol between the API library and the actual software application, it doesn’t affect the safe application.

The Y-COM programming interface is part of a complete software development kit for menTCS. In addition to that it consists of a BSP with diagnosis and monitoring functions; a synchronization interface for comparing data between both control processors and to guarantee their output at the exact same time; an exchange interface, which compares the data between control level and I/O processor; and the PACY framework (SIL 4), which takes care of the communication within the menTCS network.

For systems that need SIL 4 certification, certification packages for hardware and safety-relevant software are available. They include the assessment report from TÜV SÜD, the safety case, the safety user guide, support hours from MEN and the safe operating system from QNX.

More Information...

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