Siemens SINAMICS G150 Operating Instructions Manual page 510

Functions, monitoring, and protective functions
9.2 Drive functions
Activation via p1231 = 5 (DC braking for OFF1/OFF3)
DC braking is activated with OFF1 or OFF3
● If the motor speed ≥ p1234, the motor is braked down to p1234. As soon as the motor
speed is < p1234, the pulses are disabled and the motor is demagnetized.
● If the motor speed at OFF1/OFF3 is already < p1234, the pulses are immediately
inhibited and the motor is demagnetized.
DC braking is activated for the period set in p1233 (DC braking duration), then switched off.
When OFF1/OFF3 is prematurely canceled, then normal operation is resumed.
DC braking as emergency braking of a fault response remains active.
Function diagram
FP 7017
Parameters
• p0300:
• p0491
• p1226
• p1230
• p1231
• p1232
• p1233
• p1234
• r1239
• p2100
• p2101
510
Technology functions - DC braking
Mot type selection
Motor encoder fault response: ENCODER
Threshold for standstill detection
BI: Armature short-circuit/DC braking activation
Armature short-circuit/DC braking configuration
• 4: Internal armature short-circuit/DC braking
• 5: DC braking OFF1/OFF3
• 14: DC braking below starting speed
DC braking, braking current
DC braking duration
Speed at the start of DC braking
CO/BO: Armature short-circuit/DC braking status word
Changing the fault reaction, fault number
Changing the fault reaction, reaction
Converter cabinet units
Operating Instructions, 07/2016, A5E03347396A