Operating Instructions

SINAMICS G120 CU230P-2 Control Units
List Manual, 04/2018, A5E33838102
59
2 Parameters
2.2 List of parameters
Description: Displays the actual maximum output current of the power unit taking into account derating factors.
Description: Sets the response to a thermal overload condition of the power unit.
The following quantities can result in a response to thermal overload:
- heat sink temperature (r0037[0]).
- chip temperature (r0037[1]).
- power unit overload I2t (r0036).
Possible measures to avoid thermal overload:
- reduce the output current limit r0289 and r0067 (for closed-loop speed control) or the output frequency (for U/f
control indirectly via the output current limit and the intervention of the current limiting controller).
- reduce the pulse frequency.
A reduction, if parameterized, is always realized after an appropriate alarm is output.
Value: 0: Reduce output current or output frequency
1: No reduction shutdown when overload threshold is reached
2: Reduce I_output or f_output and f_pulse (not using I2t)
3: Reduce the pulse frequency (not using I2t)
12: I_output or f_output and automatic pulse frequency reduction
13: Automatic pulse frequency reduction
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.
r0289 CO: Maximum power unit output current / PU I_outp max
Access level: 3 Calculated: - Data type: FloatingPoint32
Can be changed: - Scaling: p2002 Dyn. index: -
Unit group: - Unit selection: - Func. diagram: -
Min Max Factory setting
- [Arms] - [Arms] - [Arms]
p0290 Power unit overload response / PU overld response
PM230
PM240
PM250, PM260
Access level: 3 Calculated: - Data type: Integer16
Can be changed: T Scaling: - Dyn. index: -
Unit group: - Unit selection: - Func. diagram: 8021
Min Max Factory setting
0 13 2