VDI9573
要根据EN ISO 12100进行风险评估和风险小化，请执行以下操作：
定义机器的边界。
2、识别与机器相关的风险。
3、风险评估。
4、风险评估。
5、通过以下方式将风险降至低：
 本质安全设计
 保护装置
 用户信息（见EN ISO 12100）
设计安全相关控制器部件（SRP/CS、控制系统的安全相关部件）
交互式流程。
要在交互过程中设计安全相关控制器部件，请执行以下操作：
有关更多信息，请访问www.schneider-electric。通用域名格式。
安全完整性等级（SIL）
标准IEC 61508定义了4个安全完整性级别（安全完整性级别（SIL））。安全完整性等级
SIL1是低级别，安全完整性级别SIL4是别。所需的安全完整性水平
给定的应用程序是根据危害和风险产生的潜在危害确定的
分析这用于决定相关功能链是否被视为安全相关
功能链及其必须覆盖的潜在危险。
每小时危险故障的平均频率（PFH）
为了维护安全相关系统的功能，IEC 61508标准要求
根据所需的安全完整性水平（安全）避免和控制故障的措施
完整性等级（SIL））。必须对所有组件进行概率评估，以评估
为控制故障而实施的措施的有效性。此评估确定
每小时发生危险故障的概率PFH（每小时发生危险故障的平均频率
（PFH）），用于安全相关系统。这是安全相关系统每小时发生故障的频率
以危险的方式，使其无法再正确执行其功能。根据SIL
对于整个安全相关系统，每小时危险故障的平均频率不得超过特定值。添加功能链的各个PFH值。结果不得超过
标准中规定的大值。
步进动作
1确定通过SRP/CS（安全相关部分）执行的必要安全功能
控制系统）。
2确定每个安全功能所需的属性。
3确定所需的性能水平PLr。
4识别执行安全功能的安全相关部件。
5确定上述安全相关部件的性能等级PL。
6验证安全功能（PL）的性能水平PL≥ PLr）。
7验证是否满足所有要求（验证）。

To perform risk assessment and risk minimization according to EN ISO 12100, proceed as follows: 1. Defining the boundary of the machine. 2. Identifying risks associated with the machine. 3. Assessing risks. 4. Evaluating risks. 5. Minimizing risks by:  Intrinsically safe design  Protective devices  User information (see EN ISO 12100) 6. Designing safety-related controller parts (SRP/CS, Safety-Related Parts of the Control System) in an interactive process. To design the safety-related controller parts in an interactive process, proceed as follows: Additional information is available onSafety Integrity Level (SIL) The standard IEC 61508 defines 4 safety integrity levels (Safety Integrity Level (SIL)). Safety integrity level SIL1 is the lowest level, safety integrity level SIL4 is the highest level. The safety integrity level required for a given application is determined on the basis of the hazard potential resulting from the hazard and risk analysis. This is used to decide whether the relevant function chain is to be considered as a safety-related function chain and which hazard potential it must cover. Average Frequency of a Dangerous Failure per Hour (PFH) To maintain the function of the safety-related system, the IEC 61508 standard requires various levels of measures for avoiding and controlling faults, depending on the required safety integrity level (Safety Integrity Level (SIL)). All components must be subjected to a probability assessment to evaluate the effectiveness of the measures implemented for controlling faults. This assessment determines the probability of a dangerous failure per hour PFH (Average Frequency of a Dangerous Failure per Hour (PFH)) for a safety-related system. This is the frequency per hour with which a safety-related system fails in a hazardous manner so that it can no longer perform its function correctly. Depending on the SIL, the average frequency of a dangerous failure per hour must not exceed certain values for the entire safetyrelated system. The individual PFH values of a function chain are added. The result must not exceed the maximum value specified in the standard. Step Action 1 Identify necessary safety functions that are executed via SRP/CS (Safety-Related Parts of the Control System). 2 Determine required properties for each safety function. 3 Determine the required performance level PLr. 4 Identify safety-related parts executing the safety function. 5 Determine the performance level PL of the afore-mentioned safety-related parts. 6 Verify the performance level PL for the safety function (PL ≥ PLr). 7 Verify if all requirements have been met (validation).