Siemens SINAMICS S120 Function Manual page 481

Acknowledgment of faults
When the Braking Module issues a fault message at binector input p3866, an attempt is
made to acknowledge the fault using signal r3861 at terminal X21.1 booksize or X21.3
chassis every 10 ms. Alarm A06900 is output simultaneously.
Parameterization
Table 8- 4 Parameterization
Parameter Description
p1240 Vdc controller or Vdc monitoring
configuration
p2108 Ext. fault_3
p3111 BI: External fault 3 enable
p0745 BI: CU signal source for terminal
DI/DO 15 (X132.13 / X131.5)
Note
Parameterization only for power units
The parameterization described is only applicable for power units (ALM, BLM, SLM). Power
Modules in the chassis format do not require this parameterization. This is because they
either dissipate excess energy using a connected braking resistor, or they go into a fault
condition if the energy cannot be dissipated.
Fast DC link discharge (booksize)
It is only possible to quickly discharge the DC link via the Braking Module External for the
booksize format. It is activated via binector input p3863 and started after the line contactor
opens and the adjustable delay time (p3862) has expired. The fast discharge is completed
when the line contactor contact closes.
Note
A fast DC link discharge requires the use of a line contactor with feedback signal (p0860)
that is controlled via r0863.1.
Drive functions
Function Manual, 11/2017, 6SL3097-4AB00-0BP5
Sink
DO
Vector
Vector
Vector
CU
Parameter Description
0 Inhibit Vdc controller
r0722.4 DI 4 (X132.1)
r0899.2 Operation enabled
r2138.7 Acknowledge fault
Function modules
8.4 Braking Module External
Source
DO
CU
Vector
Vector
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