Implementation of safety requirements from applicable standards
The function block has been developed according to the safety requirements (from applicable standards) listed in this section. All other requirements from these standards must be observed when implementing the safety-related function.
This section describes either how the function block meets the requirements of the standards or what measures need to be taken to meet the requirements of the standards.
| Standards | Context/Requirement | Implementation | |
|---|---|---|---|
| EN 60204 | Stop functions | The safety-related function block (S_EDM_Out output) executes stop category 0. | |
| EN 60204 | Start | The signal at the S_EDM_Out output is only switched to SAFETRUE if the combination of input signals is valid. | |
| EN ISO 12100-2 | Start-up after failure of supply voltage/spontaneous restart | The safety-related function block supports a start-up inhibit after the Sicherheitssteuerung has started up and the function block has been activated. This start-up inhibit cannot be deactivated.You are responsible for planning and implementing the start-up behavior according to your risk analysis. To prevent an unintended start-up, you may need to perform an additional function start once the safety-related function has been reset. This will depend on both the results of the risk analysis and the signal path of the reset signal. | |
| EN ISO 13849-1 | Stop function | The function block sets the S_EDM_Out output to SAFEFALSE if a request for the safety-related function is detected at the S_OutControl input. There must always be a safety-related function involved in the control of the S_OutControl input. | |
| EN ISO 13849-1 | Category specifications Error detection | Single-channel safety-related function: The safety-related function block checks the initial state as well as the switching state of the feedback signal of a contactor so that it can accurately detect the state of the contactor.Two-channel safety-related function: The safety-related function block verifies the initial state as well as the switching state of the feedback signals from two contactors so that it can detect whether a contactor is inoperable and either prevent it from being switched on or switch both contactors off. |
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| EN ISO 13849-1 | Manual reset device | The Reset input supports the function of the manual reset device.
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