Siemens CU240B-2 Parameter Manual page 174

Parameters
List of Parameters
p1227 Zero speed detection monitoring time / n_standst t_monit
Access level: 3
Can be changed: U, T
Units group: -
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).
Dependency: The parameter is pre-assigned depending on the size of the power unit.
Refer to: p1226
Notice: For p1145 > 0.0 (RFG tracking) the setpoint is not equal to zero dependent on the selected value. This can there-
fore cause the monitoring time in p1227 to be exceeded. In this case, for a driven motor, the pulses are not sup-
pressed.
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 de-activated.
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.
Once the Control Unit has been booted up for the first time or if the factory settings have been defined accordingly,
the parameter is defined in accordance with the power unit.
p1228 Pulse suppression delay time / Pulse suppr t_del
Access level: 3
Can be changed: U, T
Units group: -
Min
0.000 [s]
Description: Sets the delay time for pulse suppression.
After OFF1 or OFF3 and zero speed detection, the system waits for this time to expire and the pulses are then sup-
pressed.
Dependency: Refer to: p1226, p1227
Notice: If the motor holding brake is activated, the pulse suppression is only conducted if this delay time (p1228) and then
the closing time for the brake (p1217) have elapsed.
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.
p1230[0...n] BI: DC braking activation / DC brake act
Access level: 2
Can be changed: U, T
Units group: -
Min
-
Description: Sets the signal source to activate DC braking.
Dependency: Refer to: p1231, p1232, p1233, p1234, r1239
Note: 1 signal: DC braking activated.
0 signal: DC braking de-activated.
1-174
Calculated: -
Scaling: -
Unit selection: -
Max
300.000 [s]
Calculated: -
Scaling: -
Unit selection: -
Max
299.000 [s]
Calculated: -
Scaling: -
Unit selection: -
Max
-
SINAMICS G120 / Control Units CU240B/E-2 Parameter Manual (LH11), 01/2011
Data type: FloatingPoint32
Data set: -
Factory setting
300.000 [s]
Data type: FloatingPoint32
Data set: -
Factory setting
0.010 [s]
Data type: U32 / Binary
Data set: CDS, p0170
Factory setting
0
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