Siemens SIMATIC ET 200pro - Page 244

Appendix
A.5 Acceptance tests for the safety functions
SIMATIC ET 200pro FC-2 converter
244 Operating Instructions, 04/2015, FW V4.7.3, A5E34257324B AB
Figure A-8 Acceptance test for STO (basic functions)
Procedure
To perform an acceptance test of the STO function as part of the basic functions, proceed as
follows:
Status
1.
The inverter is ready
• The inverter signals neither faults nor alarms of the safety functions
(r0945[0…7], r2122[0…7]).
• STO is not active (r9773.1 = 0).
2.
Switch on motor
2.1.
Enter a speed setpoint ≠ 0.
2.2.
Switch on the motor (ON command).
2.3.
Check that the correct motor is running.
3.
Select STO
3.1.
Select STO while the motor is running
3.2. Check the following:
• The inverter signals the following:
"STO Selection via F0 rail" (r9772.17 = 1)
• If a mechanical brake is not available, the motor coasts
down.
A mechanical brake brakes the motor and holds it to en-
sure that it remains at a standstill.