BONFIGLIOLI ACTIVE Cube ACU 201-01 Operating Instructions Manual page 173

The following characteristic is set by default and can be adapted to the application
via the parameters mentioned.
Y
pos. maximum value
50 Hz
(X1=2%/Y1=0%)
0 V
0.2 V
(0 mA)
neg. maximum value
The freely configurable characteristic enables setting a tolerance at the ends as well
as a reversal of the direction of rotation.
The following example shows the inverse reference value specification with additional
reversal of the direction of rotation. This is often used in pressure control systems.
Y
pos. maximum value
50 Hz
0 V
0.2 V
(0 mA)
-40 Hz
The definition of the analog input characteristic can be calculated via the two-point
form of the line equation. The speed Y of the drive is controlled according to the
analog control signal X.
Operating Instructions ACU
06/13
(X2=98%/Y2=100%)
9.8 V
(+20 mA)
(X1=2%/Y1=100%)
(+20 mA)
9.8 V
5.5 V
(X2=98%/Y2=-80%)
Y2
Y =
X2
Point 1:
X1 = 2.00% ⋅ 10 V
Y1 = 0.00% ⋅ 50.00
Point 2:
X2 = 98.00% ⋅ 10
Y2 10 0.00% 50.00
= ⋅
X
+10 V
Point 1:
X1 = 2.00% ⋅ 10 V
Y1 = 10 0.00% ⋅ 50.00
Point 2:
+10 V
X2 = 98.00% ⋅ 10
Y2 8 0.00% 50.00
= − ⋅
X
The reversal of the direction of rotation is
affected in this example at an analog
input signal of 5.5V.
- Y1
( )
⋅ X − X1 + Y1
- X1
= 0.20 V
Hz = 0.00 Hz
V = 9.80 V
Hz 5 0.00 Hz
=
= 0.20 V
Hz = 50.00 Hz
V = 9.80 V
Hz 4 0.00 Hz
= −
173