Siemens SINAMICS S120 Function Manual page 214

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Basic functions

6.9 Armature short-circuit brake, internal voltage protection, DC brake

Internal armature short-circuit (synchronous motors)

The internal armature short-circuit is activated via the parameter p1231 = 4. It can be

triggered via an input signal p1230 (signal = 1) or a fault response.

Both types of activation are equivalent and are no longer distinguished during the braking

operation, in contrast to DC brake (see paragraph "DC brake").

When the internal armature short-circuit protection is activated, the same mechanism as with

the integrated voltage protection will short-circuit one of the half-bridges in the Motor Module.

After completion of the internal armature short-circuit, it is continued rotor-oriented.

Internal armature short-circuit

Function Manual, (FH1), 10/2008, 6SL3097-2AB00-0BP5

Drive functions