Siemens SINAMICS S120 Function Manual page 419

In the case of brakes with a feedback signal (p1222), the inverted signal must be connected
to the BICO input for the second (p1223) feedback signal. The brake closing and opening
times can be set in p1216 and p1217.
NOTICE
Damage to the holding brake through incorrect parameterization
If parameter p1215 = 0 (no brake available) is set when a brake is present, the drive runs
with closed brake. This can destroy the brake.
Note
It is only permissible to activate brake control monitoring for power units of the "booksize"
and "blocksize with Safe Brake Relay" format (p1278 = 0).
Extended brake control for braking with feedback
For braking with feedback (p1275.5 = 1), the brake control reacts to the feedback signal
contacts of the brake. If the timer p1216 is greater than the time to the feedback signal, the
startup is delayed to the corresponding time difference.
In order to start up as far as possible without any delay, the set timer p1216 must be less
than the time to the feedback signal. If the timer is set lower however, alarm "A07931, brake
does not open" appears.
Remedy:
1. Activate "Release with feedback signal" (p1275.6 = 1).
2. Optional: In order that the alarms no longer appear, set the two timers (p1217, p1216) to
Drive functions
Function Manual, (FH1), 01/2013, 6SL3097-4AB00-0BP3
The pulse enable (BO: r1229.3) and the setpoint enable (BO: r0899.15) only depend on
the set timer (p1217, p1216). The respective enable is only determined by the feedback
signal (BI: p1222, BI: p1223). The timers (p1216, p1217) only influence the alarms
A07931 "Brake does not open" and A07932 "Brake does not close".
0 ms.
Result: The monitoring of brake and the display of the alarms are switched off.
Function modules
7.3 Extended Brake Control
417