Siemens SINAMICS G120XA, Operating Instructions Manual

Page: 496 / 918

Note
For index 0:
The monitoring time starts when the faults are detected. If the automatic acknowledgments are not successful, the
monitoring time runs again. If, after the monitoring time has expired, the drive has still not successfully started again
(flying restart and magnetizing of the motor must have been completed: r0056.4 = 1), then fault F07320 is output.
The monitoring is deactivated with p1213 = 0. If p1213 is set lower than the sum of p1212, the magnetizing time p0346
and the additional delay time due to the flying restart, then fault F07320 is generated at each restart. If, for p1210 = 1,
the time in p1213 is set lower than in p1212, then fault F07320 is also generated at each restart.
The monitoring time must be extended if the faults that occur cannot be immediately and successfully acknowledged
(e.g. for faults that are permanently present).
In the case of p1210 = 14, 16, the faults which are present must be acknowledged manually within the time in p1213[0].
Otherwise, fault F07320 is generated after the set time.
For index 1:
The start counter (refer to r1214) is only set back to the starting value p1211 if, after successful restart, the time in
p1213[1] has expired. The delay time is not effective for fault acknowledgment without automatic restart (p1210 = 1).
After a power failure (blackout) the delay time only starts after the line supply returns and the Control Unit boots. The
start counter is set to p1211, if F07320 occurred, the switch-on command is withdrawn and the fault is acknowledged.
The start counter is immediately updated if the starting value p1211 or the mode p1210 is changed.
For p1210 = 26, the fault must have been successfully acknowledged and the switch-on command issued within the
time in p1213[0]. Otherwise, fault F07320 is generated after the set time.
p1226[0...n] Threshold for zero speed detection / n_standst n_thresh
Access level: 2 Calculated: - Data type: FloatingPoint32
Can be changed: T, U Scaling: - Dynamic index: DDS, p0180
Unit group: 3_1 Unit selection: p0505 Function diagram: 8022
Min:
0.00 [rpm] Max:
210000.00 [rpm] Factory setting:
20.00 [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: See also: p1227
CAUTION
The following applies for encoderless speed control:
If p1226 is set to values under approx. 1 % of the rated motor speed, then the model switchover limits of the vector
control must be increased in order to guarantee reliable shutdown (see p1755, p1750.7).
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
Access level: 3 Calculated: - Data type: FloatingPoint32
Can be changed: T, U Scaling: - Dynamic index: -
Unit group: - Unit selection: - Function diagram: -
Min:
0.000 [s] Max:
300.000 [s] Factory setting:
300.000 [s]
Parameters
7.3 Parameters
SINAMICS G120XA converter
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Operating Instructions, 03/2019, FW V1.0, A5E44751205B AB