Details And Parameterization; Requirements - Siemens SINUMERIK MC Commissioning Manual

The SBT function integrated in the drive does not require a setpoint from the PLC or NC - but
only an enable signal from the NC, and control via PLC user program. The relevant signals
when executing the brake test (SBT) are communicated between the PLC and drive via the
Safety Info Channel and the Safety Control Channel (SIC/SCC).
● SIC/SCC communication is realized using telegram 701 (Page 355).
● The SIC/SCC signals (to control SBT) are mapped in the axis DB
(axis 1 [DB31] ... axis 31 [DB61]). Bits (DBX11.0 and DBX71.0) in the relevant axis DB are
used to control SBT. As a consequence, you can execute the SBT via PLC user program.
See: Interface signals: Axis/spindle signals (Page 379).
Note
Information for those switching over from a different system: Block required for SBT (Safe
Brake Test)
The relevant axis DB is used to control SBT. Block SI_BrakeTest [FB11], known from the
SINUMERIK Safety Integrated mode (system-integrated), is no longer used in the Safety
Integrated mode.
4.15.1

Details and parameterization

4.15.1.1

Requirements

NC
The following preconditions must be complied with before the brake test is enabled by the NC:
● The axis must be at a standstill, and be in a safe axis position.
● The NC must have issued the controller enable and pulse enable.
DRV
The following requirements must be satisfied when using the "Safe Brake Test" function with
DRV:
● The Safety Integrated Extended Functions must be enabled; also available for the Safety
Integrated Extended Functions without selection.
● Safe Brake Control must be enabled when testing a brake controlled by SINAMICS (motor
holding brake).
Safety Integrated (with SINAMICS S120)
Commissioning Manual, 02/2020, A5E46305916B AB
Safety functions integrated in the drive
4.15 SBT
171