Siemens Sinamics S120 Function Manual page 227

Run forced dormant error detection (test stop)
If the converter signals the warning A01699 or A01697, you must trigger forced dormant
error detection (test stop) at the next opportunity.
These alarms do not affect the operation of your machine. Before forced dormant error
detection (test stop), you should shut down the drive.
Not e
Int ernal selection of STO
Controlling forced dormant error detection (test stop) causes STO to be selected internally.
In this case, drives that were previously not stopped, or that do not have a holding brake,
coast down.
Triggering f orced dormant error detection (test stop)
● Extended Functions
– You define the signal with which the converter tests its circuits for speed monitoring.
– To ensure that forced dormant error detection (test stop) is performed without error,
– If you select forced dormant error detection (test stop), the converter checks the
● Basic Functions
The converter checks its circuits for interruption of the torque-generating energy feed to
the motor for one of the following conditions:
– After the power supply has been connected (POWER ON).
– Each time after selecting the function STO or SS1.
– In the forced dormant error detection (test stop) of the Extended Functions.
Not e
A dditional information
• You will find detailed information on forced dormant error detection (test stop), in Chapter
"Forced dormant error detection (test stop) (Page 160)."
• You will find a description of forced dormant error detection (test stop) of the TM54F in
Section "Forced dormant error detection (test stop) of the TM54F (Page 305)."
Safety Integrated
Function Manual, (FHS), 07/2016, 6SL3097-4AR00-0BP6
Alternatively, the test can be performed automatically every time the power supply is
switched on (POWER ON).
STO must not be active.
circuits of Extended Functions and of Basic Functions.
6.5 Forced dormant error detection (test stop)
Commissioning
227