Siemens SINAMICS G120X, Руководство по эксплуатации

Страница: 513 / 1148

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, 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 Calculated: - Data type: FloatingPoint32
Can be changed: T, U Scaling: - Dynamic index: -
Unit group: - Unit selection: - Function diagram: 8021
Min:
0 [°C] Max:
25 [°C] Factory setting:
[0] 5 [°C]
[1] 15 [°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] = Overtemperature heat sink
[1] = Temperature rise power semiconductor (chip)
Dependency: See also: r0037, p0290
See also: A05000, A05001
p0294 Power unit alarm with I2t overload / PU I2t alrm thresh
Access level: 4 Calculated: - Data type: FloatingPoint32
Can be changed: T, U Scaling: - Dynamic index: -
Unit group: - Unit selection: - Function diagram: 8021
Min:
10.0 [%] Max:
100.0 [%] Factory setting:
95.0 [%]
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: See also: r0036, p0290
See also: A07805
Note
The I2t fault threshold is 100 %. If this value is exceeded, fault F30005 is output.
p0295 Fan run-on time / Fan run-on time
Access level: 3 Calculated: - Data type: FloatingPoint32
Can be changed: T, U Scaling: - Dynamic index: -
Unit group: - Unit selection: - Function diagram: -
Min:
0 [s] Max:
600 [s] Factory setting:
0 [s]
Description: Sets the fan run-on time after the pulses for the power unit have been canceled.
Parameters
7.2 Parameter list
SINAMICS G120X converter
Operating Instructions, 06/2019, FW V1.01, A5E44751209B AC
511