Siemens CU240B-2 Parameter Manual page 173

p1217 Motor holding brake closing time / Brake t_close
Access level: 2
Can be changed: U, T
Units group: -
Min
0 [ms]
Description: Sets the time to apply the motor holding brake.
After OFF1 or OFF3 and the controlling (closing) of the holding brake, the drive remains stationary under closed-
loop control for this time with a speed setpoint of zero. The pulses are suppressed when the time expires.
Dependency: Refer to: p1215, p1216
Notice: If the selected closing time is too short with respect to the actual closing time of the brake, then the load can sag.
If the closing time is selected to be too long with respect to the actual closing time of the brake, the control works
against the brake and therefore reduces its lifetime.
p1226[0...n] Threshold for zero speed detection / n_standst n_thresh
Access level: 2
Can be changed: U, T
Units group: 3_1
Min
0.00 [rpm]
Description: Sets the speed threshold for the standstill identification.
Acts on the actual value and setpoint monitoring.
When braking with OFF1 or OFF3, when the threshold is undershot, standstill is identified.
Dependency: Refer to: p1227
Note: Standstill is identified in the following cases:
- the speed actual value falls below the speed threshold in p1226 and the time started after this in p1228 has
expired.
- the speed setpoint falls below the speed threshold in p1226 and the time started after this in p1227 has expired.
The actual value sensing is subject to measuring noise. For this reason, standstill cannot be detected if the speed
threshold is too low.
© Siemens AG 2011 All Rights Reserved
SINAMICS G120 Control Units CU240B/E-2 Parameter Manual (LH11), 01/2011
Calculated: -
Scaling: -
Unit selection: -
Max
10000 [ms]
Calculated: -
Scaling: -
Unit selection: p0505
Max
210000.00 [rpm]
Parameters
List of Parameters
Data type: FloatingPoint32
Data set: -
Factory setting
100 [ms]
Data type: FloatingPoint32
Data set: DDS, p0180
Factory setting
20.00 [rpm]
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