Checklist for the Controller System

Are you using only the certified components for your SIL level, with the corresponding firmware release, as listed at https://rok.auto/certifications?

Have you calculated the safety response time of the system for each safety function?

Does the response time of the system include both the user-defined safety-task program watchdog (software watchdog) time and the safety task rate/period?

Is the system response time in proper relation to the process safety time?

Is the system response time in proper relation to the process safety time?

Have you performed all appropriate project validation tests?

If necessary, have you created a prescan routine to initialize safety critical data?

Have you determined how your system can handle faults?

Does each network in the safety system have a unique safety network number?

Is each safety device configured with the correct safety network number?

Have you generated a safety signature?

Have you uploaded and recorded the safety signature for future comparison?

After a download, have you verified that the safety signature in the controller matches the recorded safety signature?

Do you have an alternate mechanism in place to preserve the safety integrity of the system when making online edits?

Have you considered the checklists for using SIL inputs and outputs?

Have you considered safety function muting time in your process safety time?