Siemens Sinamics S110 Function Manual page 281

This can help eliminate hazards (as far as this is possible) and can act as a basis for
implementing suitable protective measures. The risk assessment involves the following:
● Risk analysis
● Risk assessment (EN ISO 14121-1 Paragraph 8)
As part of the iterative process to achieve the required level of safety, a risk assessment is
carried out after the risk estimation. A decision must be made here as to whether the
residual risk needs to be reduced. If the risk is to be further reduced, suitable protective
measures must be selected and applied. The risk assessment must then be repeated.
Figure 8-2
Risks must be reduced by designing and implementing the machine accordingly (e.g. by
means of controllers or protective measures suitable for the safety-related functions).
If the protective measures involve the use of interlocking or control functions, these must be
designed in accordance with EN ISO 13849-1. For electrical and electronic controls, EN
62061 can be used as an alternative to EN ISO 13849-1. Electronic controls and bus
systems must also comply with IEC/EN 61508.
Drive functions
Function Manual, 10/2008, 6SL3097-4AB10-0BP0
– Determining the limits of the machine (EN ISO 12100-1, EN ISO 14121-1 Paragraph 5)
– Identifying the hazards (EN ISO 12100-1, EN ISO 14121-1 Paragraph 6)
– Estimating the level of risk (EN 1050 Paragraph 7)
Iterative process to achieve the required level of safety to ISO 14121-1
Safety Integrated Functions
8.1 Standards and regulations
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