4.15.1.4 Selection
You have the following options for the selection of the Safe Brake Test:
● Safety Control Channel (SCC) via PROFINET (external drives)
Using SCC, the SBT function can be directly controlled from a higher-level control system.
Select the brake test sequence with a 0/1 edge in S_STW3B bit 0
See also: Safety Info Channel and Safety Control Channel (SIC/SCC) (Page 212), SBT:
Communication via SIC/SCC (Page 179)
● Selection via BICO
BICO interconnection; here, digital signals (e.g. DIs) are used to operate the SBT function.
Selected using 0/1 edge at DI for p10230[0]
● Selected using test stop/forced checking procedure of the Extended Functions
Automatic execution when selecting the test stop/forced checking procedure; restricted test
options; however, no additional signals are required for the control.
Selected by a 0/1 edge in the S_STW1B bit 8 (external drives), or at the DI for p9705 (only
external drives).
After selection, initially an SBT is automatically performed followed by the test stop/forced
checking procedure.
Note
Only brake 1 when selecting using test stop/forced checking procedure
When selecting using a test stop/forced checking procedure, only the internal motor holding
brake parameterized as brake 1 is tested with test sequence 1 in the direction
parameterized in p10218.
4.15.1.5 Start of the Safe Brake Test sequence
● Make the following decisions before starting the brake test sequence:
– The brake to be tested using DI for p10230[2] or S_STW3B bit 2
– Positive or negative direction of the test torque using DI for p10230[3] or S_STW3B bit 3
– Brake test sequence 1 or 2 using DI for p10230[4] or S_STW3B bit 4.
● Start the brake test sequence using a 0/1 edge at the DI for p10230[1] or in S_STW3B bit 1.
Safety functions integrated in the drive
4.15 SBT
Safety Integrated (with SINAMICS S120)
176 Commissioning Manual, 02/2020, A5E46305916B AB
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