it is applicable to all safety-related control systems regardless of the type of technology and energy used (electric, hydraulic, pneumatic, etc.). determines the security requirements of the software.describes a simplified procedure for estimating the Performance Level (PL) of safety-related control systems this estimate takes into account the reliability of the components (MTTF D or B 10D ), the diagnostic coverage (DC), the category of the control circuit, the measures against common cause faults (CCF).provides a procedure for determining the Performance Level required for each safety function (PL r ).defines the main safety functions of the machines (emergency stop, interlocking of the movable guard, reset, guard locking, reduced speed, etc.).Specifically, the UNI EN ISO 13849-1: 2016 standard: If you want to deepen the subject, and understand what PL (Performance Levels) are and what the UNI EN ISO 13849-1 standard is for, also read the dedicated article on our blog. This standard establishes safety requirements and a guide to the principles for the design and integration of safety-related control systems (SRP / CS), including software design. In order to satisfy this requirement, it is possible to refer to the UNI EN ISO 13849-1: 2016 standard. The machinery directive 2006/42 / EC requires that the safety-related control systems for machinery are designed and constructed in such a way as to avoid the occurrence of dangerous situations and in particular in such a way that a failure in the hardware or software of the system command does not create dangerous situations.
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