Engineering Services and Verification
Functional safety engineering design
Once the machine has a documented risk assessment and the safety requirements specification is completed, the safety engineering design begins.Part of the engineering design is ensuring compliance with the following standards, ISO 13849-1 and ISO 13849-2.Included as part of the deliverable of an engineering design:
- Updated electrical schematics designed to reflect the changes recommended within the risk assessment or safety audit.
- A Bill of Material (BOM), specifying the part numbers, manufacturer and quantities, of the new risk reduction measures
- Updated programs for the safety controller and safety PLC
Safety verification – engineering design review
Safety verification through engineering design review, is part of the requirements of functional safety in ISO 13849-1. Part of the verification process is to ensure that the safety related parts of the controls system are designed to the required Category Structure and Performance Level Required. The category structure of the safety control circuit is big part of what defines the performance level of your safety functions.
Safety verification – safety program review
Safety verification through safety program review (when a safety PLC or safety controller is being used), is part of the requirements of functional safety in ISO 13849-1, which states that verification of the software measures should be taken into account when determining the performance level needed for the functional safety.
Safety verification – through the use of software based calculations (SISTEMA and others)
As part of compliance with section 4.7 of ISO 13849-1, all safety verification need to be verified to make sure that the Performance Level (PL) achieved is greater than or equal to the Performance Level Required (PLr). The Performance Level of a safety function is directly related to the Probability of dangerous failure per hour (PFHd). The PFHD can be calculated manually or via software tools (SISTEMA)