beautypg.com

NORD Drivesystems BU0180 User Manual

Page 94

background image

SK 180E Manual for frequency inverters

94

Pre-series version

BU 0180 GB-0914

Parameter

{Factory setting}

Setting value / Description / Note

Device

Supervisor

Parameter
set

1 = 0

– 10 V: If a setpoint smaller than the programmed adjustment 0% (P402) is present,

this may cause a change in the direction of rotation. This allows rotation direction reversal
using a simple voltage source and potentiometer.

E.g. internal setpoint with reversal of direction of rotation: P402 = 5V, P104 = 0 Hz,
Potentiometer 0

–10 V  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 that is
controlled by the FI will have entered 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.

2 = 0

– 10V monitored: If the minimum

adjusted setpoint (P402) is undershot by
10% of the difference value from (P403)
and (P402), the FI output switches off
As soon as the setpoint is greater than
[P402 - (10% * (P403 - P402))] it
delivers an output signal again.

f / Hz

P104

(fmin)

P105

(fmax)

P

4

0

3

=

1

0

.0

V

P

4

0

2

=

2

.0

V

= 8.0V

U/V

O

F

F

=

2

.0

V

-

1

0

%

*

8

.0

V

=

1

.2

V

E.g. setpoint 4-20 mA:: P402: Adjustment 0% = 1V; P403: Adjustment 100% = 5 V; -
10% corresponds to -0.4 V; i.e. 1...5 V (4...20 mA) normal operating zone, 0.6...1 V =
minimum frequency setpoint, below 0.6 V (2.4 mA) output switches off.

NOTE:

The SK xU4-

IOE provides the frequency inverter with a value standardised to 0…100%.

In addition, the frequency inverter also receives a bit, which confirms that the analog
input signal is within the defined limits.

Example:

Setpoint: 4 … 20 mA

0…4 mA = 0%

(0000

hex

)

20 mA

= 100% (4000

hex

)

≥ 2 mA = Bit

"Setpoint value valid"

If the "0-10 V monitored" mode is selected, the bit "Setpoint value valid" is evaluated and
if the setpoint value is undershot by a value of 2mA, the inverter output is switched off.

NOTE:

Settings of parameters (P402) and (P403) are treated in an additive manner, i.e. they
can be used for additional adjustment of the limiting values.

3 = - 10V

– 10 V: 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 = 5 V, P104 = 0 Hz,
Potentiometer 0

–10 V  Rotation direction change at 5V in mid-range setting of the

potentiometer.