Siemens SINAMICS S120 Function Manual page 306

Commissioning
6.8 Commissioning: Basic procedure
The status information is displayed on the right-hand side of the screen form for:
● Test stop required
Indicates that a forced checking procedure (test stop) is required.
– "Timer test stop" (p9659): Time interval for performing the forced checking procedure
– "Remaining time" (r9660 for the Basic Functions, r9765 for the Extended Functions)
● Internal event
Is set when the first safety message occurs.
● Communication failure
The communication (PROFIsafe) has failed.
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and testing the safety shutdown paths. Within the parameterized time, the STO must
be selected and deselected at least once. The monitoring time is reset at every STO
deselection.
shows the time remaining until the forced checking procedure and the test of the
safety shutdown paths are performed.
Function Manual, 12/2018, 6SL3097-5AR00-0BP1
Safety Integrated