Go to the top menu and select -> Local library (or use the library management window).
References and further reading (select official sources and product manuals recommended for implementation).
EtherCAT components like the EL6910 or KL6904 that process safety logic.
(Probability of Dangerous Failure per Hour): The hourly probability of a dangerous failure. MTTFDcap M cap T cap T cap F sub cap D
The base components (e.g., a specific safety relay or terminal). beckhoff sistema library
: Drag and drop Beckhoff components (like TwinSAFE terminals) from the library into your safety function project to automatically populate reliability values. Integration with TwinSAFE
A packaging machine uses an emergency stop button (B&R or Allen-Bradley, but integrated with Beckhoff I/O) connected to a TwinSAFE EL1904 input terminal. The contactor is an EL2904 output terminal.
, ensuring that a machine's safety functions meet the necessary Performance Level (PL) Key Benefits
Beckhoff’s functional safety ecosystem is branded as . The SISTEMA library covers all major categories of this hardware: TwinSAFE Logic Components Go to the top menu and select ->
Use the ST_Sistema_Config structure to define your safety category:
(for electromechanical components), or PFH (Probability of Dangerous Failure per Hour) values for a TwinSAFE terminal, engineers can simply import the Beckhoff library into the SISTEMA software. Component Data Included
// Calculate Required PL based on risk assessment fbSistema_PLr( Severity := SEVERITY.SEVERE, // S2 Frequency := FREQ.LESS_THAN_1_HOUR, // F2 PossibilityOfAvoidance := AVOID.IMPOSSIBLE // P2 ); rRequiredPL := fbSistema_PLr.PLr; // Returns PLr = e
Beckhoff Automation continues to develop and expand the TwinCAT 3 System Library, adding new features and functions to meet the evolving needs of the automation industry. Future developments are expected to include: (Probability of Dangerous Failure per Hour): The hourly
The MTTFd_Channel_A input expects years (per ISO 13849-1 standard). For electronic components with very high MTTFd (e.g., 10,000 years), the library caps the value at the maximum level (2500 years + high value = "high").
Run the calculations every time a machine enters "Setup Mode" or after a safety reset. This ensures that aging components (e.g., worn contactors) are continuously re-evaluated.
Instead of manually calculating complex probability equations, engineers can model their safety circuits within SISTEMA. However, to do this accurately, they need precise reliability data for every component used in the circuit. This is where the Beckhoff SISTEMA library becomes indispensable. What is the Beckhoff SISTEMA Library?
: Access the Beckhoff Download Finder or the SISTEMA directory and download the .xml or .slb library files. Import to SISTEMA : Open the SISTEMA software on your PC. Navigate to Edit > Libraries .