Safe Brake Test - Siemens Sinamics S120 Function Manual

Overview of Safety Integrated functions
3.2 Safety Integrated Extended Functions
3.2.13

Safe Brake Test

The diagnostic function "Safe Brake Test" function (SBT) checks the required holding torque
of a brake (operating or holding brake). You can test linear and rotary brakes. The drive
purposely generates a force/torque against the applied brake. If the brake is operating
correctly, the axis motion remains within a parameterized tolerance. If, however, a larger axis
motion is detected, it must be assumed that the braking force/torque has deteriorated and
maintenance is required.
The "Safe Brake Test" function allows a safe test of up to two brakes:
● 1 motor holding brake and 1 external brake
● 2 external brakes
● 1 motor holding brake
● 1 external brake
The Safe Brake Test (SBT) diagnostic function meets the requirements for Category 2
according to EN ISO 13849-1.
Details and parameterization
For further details and information on how to parameterize this function, see Section "Safe
Brake Test (SBT) (Page 132)".
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Function Manual, (FHS), 07/2016, 6SL3097-4AR00-0BP6
Safety Integrated