Sensor-Technik Wiedemann GmbH presents the ESX-3XL, a freely programmable control unit with controlled separation of safety-related and non-safety-related software functions.
In the ECUs of modern mobile machines, a significant proportion of the functionality must fulfil safety-related requirements. To satisfactorily control hazards to people and machines, the development must be undertaken in accordance with IEC 61508 Functional Safety of Electrical/ Electronic/ Programmable Electronic Safety-related Systems, ISO 13849 Safety of Machinery and the related standards including EN62061.
Consequently, the increasingly complex application software directly increases the development effort, since the non-safety software functions must not adversely affect the safety related functions. The IEC 61508-3 describes methods to control the possibility of negative impacts on the safety and thereby minimise the certification effort for the non-safety software components.
The ESX-3XL programmable electronic control unit from Sensor-Technik Wiedemann GmbH (STW) now offers a hardware solution with a C application programming interface (API), which supports safety-related and non-safety-related application software components together in a SIL2/PL-d system. This advanced solution is realised through memory protection mechanisms that ensure separation of standard functions and safety-related functions.
In addition to clearly defining the specific modules that need to be developed during the application design phase according to the quality requirements of IEC 61508 and EN13849, the new solution also significantly reduces the programming effort required to maintain a separation between non-safety-related and safety-related software modules.
Using this new API, it is also possible to meet all the ECU safety requirements for the CODESYS SIL2 V3 runtime system, enabling STW to fulfil the safety relevant requirements for CODESYS designs under IEC 61131-3 and IEC 61131-6.
With these developments, STW now offers their customers a simpler, more efficient path to safety certification for both C and CODESYS programs in machine applications.
The ESX-3XL programmable control unit is available from CAN Automotion