Siemens Sinamics S120 Function Manual page 137

Sequence
SBT has the following basic sequence:
Image 4-13 SBT: Time sequence
● After the user selects the brake test (0/1 edge in r10231.0), the static hanging load is
determined. For this reason, 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 SINAMICS, the
– When testing an external brake, via p10234.6 or for SIC/SCC, via S_ZSW3B.6, a
● The brake, the test sequence and the test direction are then selected by the user.
● Only when the brake test is active after the user has started the brake test/brake test
sequence (0/1 edge in r10231.1) is the holding brake closed, or there is a prompt to close
the external brake. The request to close the brake is again indicated with p10234.6 = 1 or
S_ZSW3B.6 = 1. Also in this case, only a maximum of 11 seconds must elapse,
otherwise a fault is issued.
● The test torque (test torque ± load torque for a vertical axis) 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, (FHS), 07/2016, 6SL3097-4AR00-0BP6
brake is automatically opened when the pulses are enabled and p1215=1.
value of 0 indicates that the external brake must be opened. This must occur within 11
seconds, otherwise the test is canceled and a fault is output.
Description of Safety Integrated functions
4.2 Safety Integrated Extended Functions
137