Siemens G130 List Manual page 348

2 Parameters
2.2 List of parameters
p1226[0...n] Threshold for zero speed detection / n_standst n_thresh
VECTOR_G Can be changed: U, T
Data type: FloatingPoint32
P-Group: Functions
Not for motor type: -
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.
The following applies when the brake control is activated:
When the threshold is undershot, the brake control is started and the system waits for the brake closing time in
p1217. The pulses are then suppressed.
if the brake control is not activated, the following applies:
When the threshold is undershot, the pulses are suppressed and the drive coasts down.
Dependency: Refer to: p1215, p1216, p1217, p1227
Notice: For reasons relating to the compatibility to earlier firmware versions, a parameter value of zero in indices 1 to 31 is
overwritten with the parameter value in index 0 when the Control Unit boots.
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.
p1227 Zero speed detection monitoring time / n_standst t_monit
VECTOR_G Can be changed: U, T
Data type: FloatingPoint32
P-Group: Functions
Not for motor type: -
Min
0.000 [s]
Description: Sets the monitoring time for the standstill identification.
When braking with OFF1 or OFF3, standstill is identified after this time has expired, after the setpoint speed has
fallen below p1226 (also refer to p1145).
After this, the brake control is started, the system waits for the closing time in p1217 and then the pulses are
suppressed.
Dependency: Refer to: p1215, p1216, p1217, p1226
Notice: For p1145 > 0.0 (RFG tracking) the setpoint is not equal to zero dependent on the selected value. This can therefore
cause the monitoring time in p1227 to be exceeded. In this case, for a driven motor, the pulses are not suppressed.
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.
For p1227 = 300.000 s the following applies:
Monitoring is deactivated.
For p1227 = 0.000 s, the following applies:
With OFF1 or OFF3 and a ramp-down time = 0, the pulses are immediately suppressed and the motor "coasts" down.
348
Calculated: -
Dyn. index: DDS, p0180
Unit group: 3_1
Scaling: -
Max
210000.00 [rpm]
Calculated: -
Dyn. index: -
Unit group: -
Scaling: -
Max
300.000 [s]
List Manual (LH2), 07/2016, A5E03263479A
Access level: 2
Func. diagram: 2701, 2704
Unit selection: p0505
Expert list: 1
Factory setting
20.00 [rpm]
Access level: 2
Func. diagram: 2701, 2704
Unit selection: -
Expert list: 1
Factory setting
4.000 [s]
SINAMICS G130/G150