SafeOS: Safe runtime system up to SIL3

The certified components SafeOS Runtime (safe runtime system) and SafeOS Firmware (execution control and management services) are deployed directly at the safe hardware. Thanks to these components, the efforts on the part of a manufacturer are confined to a board support package and the hardware diagnosis. Assuming a static task handling (time slice model), an independent operating system is no longer required.

SafeOS: Very successful in practice

Powerful debug functionalities

The user can switch between two SafeOS operating modes ("Safe" and "Debug"). In "Debug" mode, various monitoring and debug features are available:

• Overwriting flag variables 
• Forcing I/O variables 
• Simulation of output signals in single cycle operation 
• Starting and stopping the safety control 
• Downloading new user program 
• Color marking of operating mode 
• Static memory management to avoid access errors in dynamic memories incl. methods for detection of memory errors, e.g. for variables 
• Mechanisms for synchronization of both diversified channels 
• Special memory area for download of diagnostic information to the standard PLC

SafeOS: 2-channel and diversified architecture

As "up to SIL3 solution", SafeOS is a 2-channel diversified IEC 61508 runtime system that provides high performance due to execution of system-specific machine code. If required, RAM and CPU test can be implemented.