Siemens SINAMICS S120 Function Manual page 34

Basic Functions
3.3 Safe Brake Control (SBC)
"Safe Brake Control" does not detect faults in the brake itself, such as brake winding short-
circuit, worn brakes, etc.
If a cable breaks, this is only recognized by the "Safe Brake Control" function when the
status changes, i.e. when the brake is applied/released.
Functional features of "Safe Brake Control" (SBC)
● When "Safe Torque Off" is selected or when safety monitors are triggered, "SBC" is
● Unlike conventional brake control, SBC is executed via p1215 through two channels.
● SBC is executed regardless of the brake control or mode set in p1215. SBC is not
● The function must be enabled via parameter.
● Each time "Safe Torque Off" is selected, the holding brake is applied immediately with
Enabling the "Safe Brake Control (SBC)" function
The "Safe Brake Control" function is enabled via the following parameters:
● p9602 SI enable safe brake control (Control Unit)
● p9802 SI enable safe brake control (Motor Module)
The "Safe Brake Control" function is not active until at least one safety monitoring function
has been enabled (i.e. p9601 = p9801 ≠ 0).
Two-channel brake control
The brake is controlled from the Control Unit. Two signal paths are available for applying the
brake.
34
WARNING
performed with safe pulse cancelation.
recommended, however, when 1215 = 0 or 3.
forced dormant error detection.
Function Manual, (FHS) , 07/2007 Edition, 6SL3097-2AR00-0BP0
Safety Integrated