NORD Drivesystems BU0300 - Manual (Page 87)

7.8 Control terminals
BU 0300 EN Subject to technical alterations 87
Parameter Setting value / Description / Note
Supervisor
Parameter
set
Available with option
P401 Analog input mode 1
S
BSC STD
0 ... 3
[ 0 ] 0 = 0 – 10V limited:
An analog setpoint smaller than the programmed adjustment 0% (P402) does not lead to
undershooting of the programmed minimum frequency (P104). Therefore does not lead to
any rotation direction reversal.
1 = 0 - 10V:
If a setpoint smaller than the programmed adjustment 0% (P402) is present, this can
cause a change in direction rotation. This allows rotation direction reversal using a simple
voltage source and potentiometer.
E.g. internal setpoint with rotation direction change: P402 = 5V, P104 = 0Hz,
Potentiometer 0–10V
⇒ Rotation direction change at 5V in mid-range setting of the
potentiometer.
During the reversing moment (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 be closed 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 does
not close.
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.
Once the setpoint is greater than
[P402 * (10%*(P403-P402))], it
will deliver an output signal again.
f / Hz
P104
(fmin)
P105
(fmax)
P40
3 =
10
,0
V
P
402 = 2
.0V
= 8.0V
U/V
O
F
F
= 2.
0V
-
10%
*
8.
0V
= 1
.2V
E.g. setpoint 4-20 mA:
P402: Adjustment 0% = 1V; P403: Adjustment 100% = 5V; -10% corresponds to -0.4V;
i.e. 1...5V (4...20mA) normal operating zone, 0.6...1V = minimum frequency setpoint,
below 0.6V (2.4mA) output switches off.
3 = -10 - 10V: If a setpoint smaller than the programmed adjustment 0% (P402) is present, this
can cause a change in direction rotation. This allows rotation direction reversal using a
simple voltage source and potentiometer.
E.g. internal setpoint with rotation direction change: P402 = 5V, P104 = 0Hz,
Potentiometer 0–10V
⇒ Rotation direction change at 5V in mid-range setting of the
potentiometer.
During the reversing moment (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 not be closed.
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 does
not close.