Siemens SINAMICS S120 Function Manual page 309

While being executed, message A01772 (test stop failsafe output active) is displayed. The
messages A01772 and A01774 only disappear again after the execution. If an error has
been detected by the forced checking procedure (test stop), fault F01773 is output. Using the
test sequence specified for each mode, you can see which error has occurred from the fault
value of the test step.
Danger to life due to unwanted movement given improper use of the feedback DI of the F-
DO
With the test sequence, unwanted movements of the drive can be caused if the DI of the
F-DO is not only used for feedback with test stop/forced checking procedure but also for
other purposes.
• Only use the DI of the F-DO for the feedback signal with forced checking procedure (test
Forced checking procedure (test stop): Duration
You can calculate the duration using this formula:
T
Test stop
Safety Integrated
Function Manual, 12/2018, 6SL3097-5AR00-0BP1
WARNING
stop) - and not for other purposes.
= 8 · p9500 + 6 · p10001
Test of the Evaluation of the
F-DO active F-DIs
Commissioning
6.9 Commissioning CU310-2
307