2. Make sure that you can run and stop the motor freely.
3. Start the drive and set it to a motor speed typical for the application.
4. Activate the SS1-t function from the safety PLC.
5. Set drive emergency ramp time to be longer than SS1-t time (drive parameter groups
23 and 46 depending on operation mode - see drive firmware manuals).
6. After SS1-t time runs out and the drive STO is activated, make sure that the system
behaves in a safe way.
7. Restore drive emergency ramp time value to match your application requirement.
8. Remove SS1-t request/activation from the safety PLC.
9. Reset safety ramp fault from the drive.
10. If drive parameter 31.22 is set to fault/fault, reset the fault.
11. Proceed to the SS1-t validation.
￭ Validation of the SS1-t function
1. Make sure that the SS1-t function is configured correctly.
2. Make sure that you can run and stop the motor freely.
3. Start the drive and set it to a motor speed typical for the application.
4. Activate the SS1-t function from the safety PLC.
5. Make sure that the motor speed ramps down properly and the time monitoring delay is
set correctly.
6. Make sure that the drive STO is activated when the drive reaches zero speed.
7. Make sure that the drive cannot be restarted as long as SS1-t function request is on.
8. Remove SS1-t function request/activation from the safety PLC.
9. If safety function acknowledgement is configured to be manual in safety PLC, make
sure that the drive cannot be restarted.
10. Acknowledge the safety function from the safety PLC.
11. If drive parameter 31.22 is set to fault/fault, make sure that the drive cannot be restarted.
12. Reset Drive fault.
13. Check that there are no unwanted errors in the drive.
14. Restart the drive and make sure that the motor runs normally.
176 Verification and validation
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