Siemens SINAMICS G120 List Manual page 59

Value: 0:
1:
2:
3:
12:
13:
Dependency: If a sine-wave filter is parameterized as output filter (p0230 = 3, 4), then only responses can be selected without
pulse frequency reduction (p0290 = 0, 1).
For a thermal power unit overload, an appropriate alarm or fault is output, and r2135.15 or r2135.13 set.
Refer to: r0036, r0037, p0230, r2135
Refer to: A05000, A05001, A07805
Notice: If the thermal overload of the power unit is not sufficiently reduced by the actions taken, the drive is always shut
down. This means that the power unit is always protected irrespective of the setting of this parameter.
Note: The setting p0290 = 0, 2 is only practical if the load decreases with decreasing speed (e.g. for applications with
variable torque such as for pumps and fans).
Under overload conditions, the current and torque limit are reduced, and therefore the motor is braked and forbidden
speed ranges (e.g. minimum speed p1080 and suppression [skip] speeds p1091 ... p1094) can be passed through.
For p0290 = 2, 3, 12, 13, the I2t overload detection of the power unit does not influence the response "Reduce pulse
frequency".
When the motor data identification routine is selected, p0290 cannot be changed.
For short-circuit/ground fault detection, when the test pulse evaluation is active via p1901 "Test pulse evaluation
configuration", the pulse frequency at the instant of switch on is briefly reduced.
p0292[0...1] Power unit temperature alarm threshold / PU T_alrm thresh
Access level: 3
Can be changed: U, T
Unit group: -
Min
0 [°C]
Description: Sets the alarm threshold for power unit overtemperatures. The value is set as a difference to the tripping (shutdown)
temperature.
Drive:
If this threshold is exceeded, an overload alarm is generated and the system responds as parameterized in p0290.
Infeed:
When the threshold value is exceeded, only an overload alarm is output.
Index: [0] = Heat sink temperature
[1] = Power semiconductor (chip) temperature
Dependency: Refer to: r0037, p0290
Refer to: A05000
p0294 Power unit alarm with I2t overload / PU I2t alrm thresh
Access level: 4
Can be changed: U, T
Unit group: -
Min
10.0 [%]
Description: Sets the alarm threshold for the I2t power unit overload.
If this threshold is exceeded, an overload alarm is generated and the system responds as parameterized in p0290.
Dependency: Refer to: r0036, p0290
Refer to: A07805
Note: The I2t fault threshold is 100 %. If this value is exceeded, fault F30005 is output.
SINAMICS G120 Control Units CU240B-2/CU240E-2
List Manual (LH11), 01/2016, A5E33839529
Reduce output current or output frequency
No reduction shutdown when overload threshold is reached
Reduce I_output or f_output and f_pulse (not using I2t)
Reduce the pulse frequency (not using I2t)
I_output or f_output and automatic pulse frequency reduction
Automatic pulse frequency reduction
Calculated: -
Scaling: -
Unit selection: -
Max
25 [°C]
Calculated: -
Scaling: -
Unit selection: -
Max
100.0 [%]
2 Parameters
2.2 List of parameters
Data type: FloatingPoint32
Dyn. index: -
Func. diagram: -
Factory setting
[0] 5 [°C]
[1] 15 [°C]
Data type: FloatingPoint32
Dyn. index: -
Func. diagram: 8021
Factory setting
95.0 [%]
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