Siemens Sinamics S120 Function Manual page 270

Basic functions
6.14 Simple brake control
The start of the closing time for the brake depends on the expiration of the shorter of the two
times p1227 (standstill detection monitoring time) and p1228 (pulse cancellation delay time).
The holding brake must not be used as a service brake.
When holding brakes are used, the special technological and machine-specific conditions
and standards for ensuring personnel and machine safety must be observed.
The risks involved with vertical axes, for example, must also be taken into account.
Commissioning
Simple brake control is activated automatically (p1215 = 1) when the Motor Module has an
internal brake control and a connected brake has been found.
If no internal brake control is available, the control can be activated using a parameter
(p1215 = 3).
CAUTION
If p1215 = 0 (no brake available) is set when a brake is present, the drive runs with applied
brake. This can destroy the brake.
CAUTION
It is only permissible to activate brake control monitoring for booksize power units and
blocksize power units with Safe Brake Relay (p1278 = 0).
Function diagrams (see SINAMICS S120/S150 List Manual)
● 2701 Simple brake control (r0108.14 = 0)
● 2704 Extended brake control (r0108.14 = 1)
Overview of important parameters (see SINAMICS S120/S150 List Manual)
● r0056.4 Magnetizing complete
● r0060 CO: Speed setpoint before the setpoint filter
● r0063 CO: Actual speed value after actual-value smoothing (servo)
● r0063[0...2] CO: Speed actual value
● r0108.14 Extended brake control
● p0855[C] BI: Unconditionally release holding brake
● p0856 BI: Speed controller enabled
● p0858 BI: Unconditionally close holding brake
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WARNING
Function Manual, (FH1), 01/2012, 6SL3097-4AB00-0BP2
Drive functions