Safe Brake Test (Sbt) - Siemens SINUMERIK Series Function Manual

Commissioning - drive-based
3.9 Safety Integrated functions
3.9.12

Safe Brake Test (SBT)

The "Safe Brake Test" function (SBT) checks the holding torque of a brake (operational or
holding brake). The drive purposely generates a configurable torque against the applied brake.
If the brake is operating correctly, the axis motion remains within a parameterized tolerance.
However, if larger axis motion is identified from the encoder actual values, the brake is not in
a position to provide the specified holding torque. The brake must now be serviced or replaced.
Precondition
The commissioning mode (Page 49) must be activated so that the parameters of this safety
function can be changed. The SBT safety function is only available for the selected drive, if,
inOptions (Page 64), one of the two functions was previously set and parameterized:
● Extended Functions via the TM54F
● Extended functions via the TM54F and basic functions via onboard terminals.
Settings
You can make the following settings for the drive in this window:
Figure 3-19
● SBT enable (p10201.1)
Setting to enable the safe brake test. "Enable safe brake test" can be activated using the
checkbox.
● SBT motor type (p10204)
Selecting the motor type for the safe brake test.
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Safe Brake Test - SBT
Function Manual, 10/2015, 6FC5397-3EP40-5BA3
Safety Integrated