NORD Drivesystems BU0750 - Manual (Page 96)

NORDAC SK 750E Manual
96 Subject to technical amendments BU 0750 GB-3311
Parameter Setting value / Description / Note
Parameter
set
Available with option
3 = - 10V – 10V: If a setpoint smaller than the programmed adjustment 0% (P402) is present, this
may cause a change in the direction of rotation. This allows reversal of the direction of rotation
using a simple voltage source and potentiometer.
E.g. internal setpoint with reversal of direction of rotation: P402 = 5V, P104 = 0Hz,
Potentiometer 0
–10V 
Rotation direction change at 5V in mid-range setting of the
potentiometer.
At the moment of reversal (hysteresis =

P505), the drive stands still when the minimum
frequency (P104) is smaller than the absolute minimum frequency (P505). A brake which is
controlled by the FI has not been applied in the hysteresis range.
If the minimum frequency (P104) is greater than the absolute minimum frequency (P505),
the drive reverses when the minimum frequency is reached. In the hysteresis range

P104,
the FI supplies the minimum frequency (P104), the brake controlled by the FI is not applied.
P402 Analog input adjustment 1 0%
BSC STD MLT
-50.0..00.500.0 V
[ 0.0 ] This parameter sets the voltage, which is to correspond with the minimum value of the selected
function of analog input 1.
In the factory setting (setpoint) this value corresponds to the setpoint which is set by P104
>Minimum frequency<.
Typical setpoints and corresponding settings:
0 – 10V 
0.0 V
2 – 10 V 
2.0 V (for function 0-10 V monitored)
0 – 20 mA 
0.0 V (internal resistance approx. 250

)
4 – 20 mA 
1.0 V (internal resistance approx. 250

)
P403 Analog input adjustment 1 100%
BSC STD MLT
-50.0..00.500.0 V
[ 10.0 ] This parameter sets the voltage, which is to correspond with the maximum value of the selected
function of analog input 1.
In the factory setting (setpoint) this value corresponds to the setpoint which is set by P105
>Maximum frequency<.
Typical setpoints and corresponding settings:
0 – 10 V 
10.0 V
2 – 10 V 
10.0 V (for function 0-10 V monitored)
0 – 20 mA 
5.0 V (internal resistance approx. 250

)
4 – 20 mA 
5.0 V (internal resistance approx. 250

)
P400 ... P403
P401 = 0

0 –10V limited
0.0V 2.5V 5.0V 10.0V
P105
P104
P402 P403
output
frequency
setpoint
voltage
positive
P401 = 1

0 –10V not limited
0.0V 2.5V 5.0V 10.0V
P105
P104
P402 P403
output
frequency
setpoint
voltage
positive
negative