Pilz PAScal calculates PL/SIL using VDMA 66413, verifies compliance with EN ISO 13849 or EN 62061, and outputs a PDF result sheet summarizing component data, calculated PL/SIL, and compliance status. This PDF includes safety details and audit trails. All calculations comply with safety standards. Verified. See.?!
Purpose and Scope of the Calculator
Pilz PAScal is engineered to calculate the achievable Performance Level (PL) or Safety Integrity Level (SIL) for safety‑related control systems by using detailed component data such as failure rates, redundancy, and diagnostic coverage. The calculator automatically verifies that the computed PL or SIL meets the required level specified by EN ISO 13849 or EN 62061, ensuring regulatory compliance. It outputs a comprehensive PDF result sheet that captures all input parameters, intermediate calculations, and the final compliance verdict, providing a clear audit trail for certification purposes. The scope extends beyond basic calculation: PAScal incorporates the VDMA 66413 library for accurate component data, supports both functional safety and machine safety standards, and facilitates export of results in a standardized, machine‑readable format. By consolidating calculation, verification, and documentation into a single workflow, PAScal streamlines the safety validation process for complex industrial automation systems, enabling engineers to present a traceable safety assessment to stakeholders and certification bodies.
Key Features and Functions
Pilz PAScal delivers a comprehensive suite of tools designed to streamline the safety assessment of control systems. First, the calculator pulls component data directly from the VDMA 66413 library, ensuring that failure rates, diagnostic coverage, and redundancy configurations reflect the most current industry standards. Users may also override these defaults with custom parameters, allowing for the evaluation of proprietary or legacy components. Once the data are entered, PAScal automatically computes the probability of dangerous failure per hour (PFHd) in strict adherence to EN ISO 13849 and EN 62061 guidelines, providing a quantitative basis for safety level determination.
Next, the software performs a full PL or SIL analysis, comparing the achieved safety level against the user‑specified requirement. Any discrepancy is highlighted, and the tool offers guidance on how to adjust component selection or system architecture to meet the target; The entire calculation process is logged, creating an audit trail that can be reviewed or exported for regulatory submissions.
One of the calculator’s standout features is its PDF result sheet generation. The PDF contains a detailed breakdown of every input value, intermediate calculation step, and the final compliance decision. It is fully machine‑readable, making it suitable for archival purposes or for inclusion in certification dossiers. Users can choose to export raw data tables, enabling deeper analysis or integration with other engineering tools.
Additional conveniences include an intuitive, step‑by‑step user interface that guides engineers through data entry, validation checks that prevent common input errors, and version control for component libraries, ensuring that calculations remain consistent over time. By consolidating all these functions into a single, user‑friendly platform, Pilz PAScal not only simplifies the safety validation workflow but also enhances traceability and confidence throughout the engineering process.
Technical Foundations
Pilz PAScal integrates the VDMA 66413 library, enabling accurate PFHd calculations per EN ISO 13849 and EN 62061. The engine cross‑checks computed PL/SIL against user‑defined targets, ensuring compliance. Results are compiled into a PDF, trails and component data for certification.
VDMA 66413 Library Integration
Pascal Safety Calculator incorporates the VDMA 66413 library, a comprehensive reference for safety component data, failure rates, and reliability parameters. By embedding this library, the calculator automatically retrieves accurate PFHd values for each component, ensuring that the probability of dangerous failure per hour is calculated in accordance with the latest industry standards. The library’s extensive database covers a wide range of safety devices, from switches and sensors to safety relays and logic modules, allowing users to model complex safety circuits with confidence. Each component’s PFHd is combined with the system’s configuration—such as redundancy, fault‑tolerant architectures, and safety functions—to compute the overall system PL or SIL. The integration also supports dynamic updates; as new component data become available, the library can be refreshed, keeping the calculator’s results current and compliant with evolving EN ISO 13849 and EN 62061 requirements. This seamless integration eliminates manual data entry errors and provides a single source of truth for safety analysis, making the PDF result a reliable artifact for audit and certification purposes.
The PDF includes a table of all input components, their PFHd values, and the calculated safety level. It lists any safety functions that do not meet the required PL or SIL, providing recommendations for corrective actions. This report serves as a ready audit trail for safety engineers, ensuring traceability and compliance throughout the product lifecycle for audit.!!
Compliance with EN ISO 13849 and EN 62061
Pascal Safety Calculator ensures full compliance with EN ISO 13849 and EN 62061 by automatically applying the failure probability calculations defined in these standards. The tool uses the VDMA 66413 library to obtain component PFHd values, then aggregates them according to the safety function architecture specified by the user. For EN ISO 13849, the calculator evaluates the safety integrity level (SIL) or performance level (PL) based on the system’s fault‑tolerant design, redundancy, and diagnostic coverage. For EN 62061, it calculates the required PL or SIL for functional safety in automotive and industrial applications, verifying that the chosen safety components meet the probability of dangerous failure per hour (PFHd) thresholds. The result PDF contains a detailed audit trail: each component’s PFHd, the overall system PL or SIL, and a compliance check against the target level. If the system falls short, the report highlights the shortfall and suggests corrective actions, such as adding redundancy or selecting higher‑rated components. The PDF also includes a summary table of all input data, the calculated safety level, and the compliance status, providing a ready‑to‑present artifact for certification bodies and internal reviews. By automating these calculations and presenting them in a structured PDF, Pascal Safety Calculator eliminates manual errors and ensures that safety analyses are traceable, repeatable, and aligned with the latest EN ISO 13849 and EN 62061 requirements. The PDF export feature lets users archive results, share them with stakeholders keep compliance for audits.
Using the Calculator
Launch Pascal Safety Calculator and select the desired safety standard. The wizard guides you through project creation, naming, and versioning. Choose the target system architecture, set safety goals, and configure calculation parameters before proceeding to component entry. All steps are logged for audit trails!!
Inputting Component Data
In the PAScal interface, the user starts by creating a new safety project or opening an existing one. The first step is to define the safety function to be evaluated. Once the function is selected, the wizard shows a list of safety‑related components that can be added. Each component is identified by its part number, manufacturer, and safety rating. The user must enter the probability of dangerous failure per hour (PFHd) for each element, typically taken from the component datasheet or the VDMA 66413 library. If a component is part of a redundant arrangement, the user specifies the redundancy level and the configuration (e.g., 1‑of‑2, 2‑of‑3). The software automatically calculates the combined PFHd for the arrangement using the VDMA formulas. The user can also input mean time between failures (MTBF) and mean time to repair (MTTR) if the component is repairable. The calculator allows assigning a safety integrity level (SIL) or performance level (PL) target. Once all components are entered, the wizard checks consistency to ensure the data set is complete and mandatory fields are present. The result is a component list that serves as the basis for the subsequent PL or SIL calculation. This list is also exported to the PDF result sheet, where each component’s contribution to the overall safety integrity is clearly documented. The user can review, edit, or delete components before finalizing the calculation, ensuring that the safety analysis reflects the actual system configuration. The calculation engine updates the result sheet in real time as data changes. All actions are logged for audit purposes. The PDF export includes a summary table and a detailed breakdown of each component’s PFHd contribution.
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Performing PL and SIL Calculations
Once the component list is finalized, the user clicks “Calculate.” PAScal aggregates the PFHd values of all safety‑related elements, considering redundancy and the VDMA 66413 safety‑function model. It then applies EN ISO 13849 or EN 62061 equations to derive the overall PFHd for the safety function. From this PFHd, the software computes the achievable PL (using the PL‑PFHd relation of EN ISO 13849‑1) or SIL (using the SIL‑PFHd relation of EN 62061). If the calculated PL or SIL meets or exceeds the target, the result is marked “Compliant”; otherwise, it is flagged “Non‑compliant” and the user is prompted to adjust component selection or redundancy. The result sheet, which will be exported as a PDF, displays the calculated PFHd, the achieved PL or SIL, the target level, and a compliance status. The sheet also lists each component’s contribution to the overall PFHd, allowing the engineer to identify critical elements. The calculation step is fully auditable: each intermediate value is logged, and the final PDF includes a detailed audit trail, ensuring traceability for safety certification and future maintenance.
Additional analysis shows that PAScal can handle complex safety architectures, including multi‑layer redundancy and networked safety components. The calculation engine automatically applies the VDMA safety‑function model to each layer, aggregates the results, and presents a consolidated safety integrity level. Engineers can export the detailed breakdown to the PDF, facilitating peer review and audit compliance. The tool also supports scenario simulation, allowing the user to test alternative component configurations and observe the impact on the overall PL or SIL before committing to hardware changes.
For users requiring insight, PAScal offers a graphical view of the safety function’s fault tree, highlighting critical paths and failure modes. This visual aid helps engineers prioritize component upgrades and design modifications. The PDF export preserves all visual elements, ensuring safety analysis remains auditable throughout the lifecycle. See details
Interpreting the Result Sheet
After the calculation phase, the PDF result sheet presents a concise summary of the safety assessment. The top section lists the target PL or SIL, the achieved level, and a compliance flag. A green “Compliant” indicator confirms that the calculated PFHd satisfies the required safety integrity, while a red “Non‑compliant” flag signals the need for redesign or component replacement. Below the compliance status, a detailed PFHd table shows each safety‑related component, its individual PFHd contribution, and the cumulative PFHd for the entire safety function. This table allows engineers to pinpoint which elements dominate the failure probability and to evaluate the effectiveness of redundancy schemes. A graphical fault‑tree diagram is also included; the diagram visually maps out the logical relationships between component failures and the overall safety function. By hovering over nodes in the PDF, users can access tooltips that provide the exact PFHd value, the component’s safety rating, and the impact on the final PL or SIL. The result sheet further contains a “Recommendations” section, which suggests specific actions—such as adding a redundant sensor or upgrading to a higher‑rated actuator—to improve safety integrity if the current configuration falls short. Finally, the PDF footer records the calculation date, the version of the PAScal software, and a unique project identifier, ensuring traceability for future audits or maintenance activities. The PDF is fully searchable, enabling audits and ensuring all safety calculations remain transparent for compliance!
Exporting Results as PDF
Pilz PAScal allows users to export the safety assessment as a PDF. The export button generates a formatted sheet containing component data, PFHd values, achieved PL or SIL, and compliance status. The PDF is fully searchable and includes audit trails for traceability. Compliance.!
PDF Format and Included Information
The exported PDF from Pilz PAScal is a comprehensive, machine‑readable document that consolidates all safety‑related data for a given assessment. It contains a header with the project name, version of the PAScal tool, and the date of generation, ensuring traceability. The body of the PDF is divided into several clearly labeled sections:
- Component Overview – lists every safety component used, its manufacturer, part number, and the assigned safety integrity level.
- PFHd Calculations – shows the probability of dangerous failure per hour for each component and the overall system, derived from VDMA 66413 tables.
- Achieved PL/SIL – presents the calculated performance level or safety integrity level, along with the target PL or SIL required by EN ISO 13849 or EN 62061.
- Compliance Verification – a pass/fail indicator that confirms whether the achieved level meets the specification, with a brief justification.
- Audit Trail – records the user, time stamps, and any changes made during the calculation session.
All figures are presented in both numeric and graphical formats where appropriate, and the PDF is fully searchable, allowing quick navigation to specific sections or data points. The document can be printed or stored digitally for future reference, ensuring that the safety assessment remains compliant with regulatory requirements.
Additionally, the PDF includes a table of contents with clickable links, page numbers, and a footer that displays the document ID and revision number. Users can also apply password protection or digital signatures to safeguard the integrity of the assessment. The file size is optimized for both high‑resolution printing and lightweight web sharing, making it suitable for internal audits or external certification bodies.
When exporting, users can choose between standard PDF or PDF/A‑1b format to meet archival requirements. The tool also offers an option to embed metadata such as the project’s unique identifier, the safety engineer’s signature, and the certification body’s reference number. This metadata is searchable and can be validated by external software to ensure authenticity.
Finally, the PDF includes a summary page that lists the overall safety assessment outcome, any recommended actions, and the next review date. This page serves as a quick reference for stakeholders who need to verify compliance without delving into the full technical details.
The header on each page displays the project title and the version of the safety calculator, while the footer contains the page number and a confidentiality notice. The document is fully compliant with PDF/A‑1b, ensuring long‑term preservation and compatibility with archival systems. Users can also export the data as a CSV file for integration with other tools.
For large projects, the PDF can be split into multiple sections, each representing a subsystem, to facilitate distributed review. Each section includes its own header, footer, and a local table of contents, ensuring that reviewers can focus on the relevant part of the assessment without confusion.
Export settings also allow the user to include or exclude raw calculation data, enabling a concise view for high‑level stakeholders or a detailed view for technical teams;
All PDFs are signed with a Pilz digital certificate, ensuring authenticity.
After saving, you can open the PDF with any viewer. Pilz PAScal also lets you add a digital signature or password protect the file directly from the export dialog, ensuring tamper‑proof integrity. The PDF can be emailed or uploaded to a secure repository for audit trails. All data is encrypted.