Safety of the Machine or System
Dieses Thema enthält die folgenden Abschnitte:
- Safety of personnel and equipment
- Drawing up and implementing a safety concept
- Verifying hardware and parameterization
Safety of personnel and equipment
The safety of personnel and equipment can only be assured if the safety-related function blocks are used correctly. Note that responsibility for fault avoidance lies with the user.
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WARNUNG
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| Non-conformance to safety function requirements The operator bears sole responsibility for the safety of the machine or system. |
Drawing up and implementing a safety concept
In order to use the safety-related function blocks described in this document, you must have drawn up an appropriate safety concept for your machine or system. This includes a hazard and risk analysis, as well as a test report for validating the safety-related functions.
The target safety integrity (SIL according to IEC 61508 and performance level according to EN ISO 13849-1) is ascertained on the basis of the risk analysis. The safety integrity level or category ascertained determines how you have to connect and use the safety-related function block within the overall safety-related function.
Within the safety-related control system you are using, the safety-related function block supports the following safety integrity requirements:- up to SIL 3 according to standard IEC 61508,
- up to SILCL 3 according to standard EN 62061,
- up to performance level e/Cat. 4 according to standard EN ISO 13849-1.
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WARNUNG
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| Non-conformance to safety function requirements Verify that your safety-related application implements all additional requirements resulting from applicable directives and standards in order to meet the required safety integrity requirements. |
Verifying hardware and parameterization
Please note that you must carry out a validation every time you make a safety-related modification to your overall system. Use the relevant check lists for validation purposes.
Use your test report to ensure that- the correct safety-related sensors and actuators are properly connected,
- the parameterization of the inputs and outputs as well as any devices/modules is correct,
- the function block inputs and outputs have been correctly linked to the signals of the safety-related sensors and actuators (single-channel or two-channel),
- cross-circuit and wire-break monitoring has been implemented in your application, where necessary,
- all safety-related function blocks and functions in the safety-related code are connected correctly.