● After deselection of the test sequence (test sequence is switched off), another test
sequence can be started, e.g. with a different brake in a different direction, assuming that
the brake test is still selected.
● When the test sequence is active, the brake that is not being tested must remain open.
● After deselection of the SBT, the original speed setpoint takes effect again.
4.15.1.7 Cancellation/deselection and acknowledgment (SBT)
An active brake test is cancelled through deselection of the test sequence or deselection of the
brake test. Alarm A01782 is output.
Acknowledging alarms
The alarms relevant for the brake test can only be safely acknowledged (failsafe acknowledge),
and under certain circumstances only acknowledged, when the brake test is deselected. For
"motion monitoring without selection", a POWER ON is required – or STO/SS1 must be
selected/deselected (for a configured extended alarm acknowledgment).
Safety functions integrated in the drive
4.15 SBT
Safety Integrated (with SINAMICS S120)
178 Commissioning Manual, 02/2020, A5E46305916B AB
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