Siemens SINAMICS S120 Function Manual page 147

Sequence
SBT has the following basic sequence:
Figure 4-20 SBT: Time sequence
● After you have selected the brake test (0/1 edge in r10231.0), the drive determines the
static suspended load. This is the reason that all brakes must be open and the pulses
enabled when the brake test is selected.
– When testing a motor holding brake, which is directly controlled from the drive, the
– When testing an external brake, via p10234.6 or for SIC/SCC, via S_ZSW3B.6, a
● Then select the brake, the test sequence and the test direction.
● Start the brake test/test sequence (0/1 edge in r10231.1):
– This activates the brake test.
– The drive closes the motor holding brake or requests closing of the external brake.
● The test torque is specified during the SBT. When n = 0 is entered, the controller builds
up an appropriate test torque against the closed brake. The test torque is built up along a
ramp. The ramp is defined by the time of p10208.
Safety Integrated
Function Manual, 12/2018, 6SL3097-5AR00-0BP1
dive automatically opens when the pulses are enabled and p1215 = 1.
value of 0 indicates that the external brake must be opened. Open the brake within
11 s, otherwise the drive aborts the test and outputs a fault.
The request to close the brake is again indicated via p10234.6 = 1 or S_ZSW3B.6 = 1.
Also in this case, only a maximum of 11 seconds must elapse, otherwise the drive
outputs a fault.
Description of Safety Integrated functions
4.2 Safety Integrated Extended Functions
145