Siemens SINAMICS V20 Series Operating Instructions Manual page 133

Parameter Function
Notice: P0290 = 0, 2:
Reduction of output frequency is only effective if the load is also reduced.
•
This is for example valid for light overload applications with a quadratic torque characteristic as pumps
or fans.
For settings P0290 = 0 or 2, the I-max controller will act upon the output current limit (r0067) in case of
•
overtemperature.
P0290 = 0:
With pulse frequencies above nominal, pulse frequency will be reduced to nominal immediately in the
•
event of r0027 greater than r0067 (current limit).
P0290 = 2, 3:
The pulse frequency P1800 is reduced only if higher than 2 kHz and if the operating frequency is below
•
2 Hz.
The actual pulse frequency is displayed in r1801[0] and the minimal pulse frequency for reduction is
•
displayed in r1801[1].
Inverter I
•
A trip will always result, if the action taken does not sufficiently reduce internal temperatures.
P0291[0...2] Inverter protection
Bit
00
01
02
Note: See P0290
P0292 Inverter temperature
warning [°C]
Defines the temperature difference (in °C) between the overtemperature trip threshold (F4) and the
warning threshold (A504) of the inverter. The trip threshold is stored internally by the inverter and cannot
be changed by the user.
P0294 Inverter I
Defines the [%] value at which warning A505 (inverter I
Inverter I
The I t calculation value is deemed = 100 % when this maximum tolerable period is reached.
2
Dependency:
The output current of the inverter has been reduced.
•
The value of I
•
Note: P0294 = 100 % corresponds to stationary nominal load.
P0295 Inverter fan off delay
time [s]
Defines inverter fan switch off delay time in seconds after inverter has stopped.
Note: Setting to 0, inverter fan will switch off when the inverter stops, that means no delay.
P0304[0...2] Rated motor voltage [V]
Nominal motor voltage from rating plate.
Dependency: Changeable only when P0010 = 1 (quick commissioning).
Default value is depending on inverter type and its rating data.
SINAMICS V20 Inverter
Operating Instructions, 07/2012, A5E03728167
Range
t acts upon output current and output frequency, but not on pulse frequency.
2
0 - 6
Signal name
Pulse frequency reduced
Reserved
Phase loss detection
0 - 25
t warning [%] 10.0 -
2
100.0
t calculation is used to determine a maximum tolerable period for inverter overload.
2
t does not exceed 100 %.
2
0 - 3600
10 - 2000
Factory Can be
default changed
1 T
5 U, T
95.0 U, T
t) is generated.
2
0 U, T
400 C(1)
Parameter list
7.2 Parameter list
Scaling Data Data
set type
- DDS U16
1 signal 0 signal
Yes No
Yes No
No Yes
- - U16
- - Float
- - U16
- DDS U16
Acc.
Level
4
3
3
3
1
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