NORD Drivesystems BU0300 User Manual
Page 105
7.9 Additional parameters
BU 0300 EN
Subject to technical alterations
105
Parameter
Setting value / Description / Note
Supervisor
Parameter
set
Available with option
P520 Flying
start
S P
Always available
0 ... 4
[ 0 ]
This function is used to connect the FI to already rotating motors, e.g. in ventilation drives.
0 = Switched off,
no flying start.
1 = Both directions,
the FI looks for a speed in both directions.
2 = Setpoint value direction,
searches only in the direction of the setpoint value present.
3 = Both directions,
only after mains supply failure and fault
4 = In setpoint direction,
only after mains supply failure and fault
P521
Flying start resolution
S P
Always available
0.02 ... 2.50
[ 0.05 ]
Using this parameter, the flying start search increment size can be adjusted. Values that are too large
affect accuracy and causes the FI to cut out with an overcurrent report. If the values are too small,
the search time is greatly extended.
P522
Flying start offset
S P
Always available
-10.0 ... 10.0 Hz
[ 0.0 ]
A frequency value that can be added to the frequency value found, e.g. to remain in the motor range
and so avoid the generator range and therefore the chopper range.
P523 Factory
setting
S
Always available
0 ... 2
[ 0 ]
By selecting the appropriate value and confirming it with the ENTER key, the selected parameter
range is entered in the factory setting. Once this setting is made, the parameter value automatically
changes back to 0.
0 = No change:
Does not change the parameterisation
1 = Load factory settings:
The complete parameterisation of the FI reverts to the factory
setting. All originally parameterised data are lost.
2 = Factory settings without bus:
All parameters of the FI, with the exception of the Bus
parameter, are reset to the factory setting.
P535 I
2
t motor
S
Always available
0 ... 1
[ 0 ]
0 = Switched
off
1 = Switched
on
When calculating the motor temperature, the output current, time and the output frequency (cooling)
are taken into account. When the temperature limit value is reached, this causes a switch off and an
fault message E002/2.1 (motor over-temperature). Possible positive or negative effects of ambient
conditions cannot be taken into account here.
NOTE:
If an external fan is used, this parameter should be switched off (0).
P537
Current limit, via pulse switch off
S
Always available
0 ... 1
[ 1 ]
This function prevents rapid shutdown of the FI according to the load. With the current limit switched
on the output current is limited to approximately 150% of the FI nominal current. This limitation is
implemented by brief switching off of individual output stage transistors, the actual output frequency
remains unchanged.
0 = Off
1 = On