BONFIGLIOLI Agile Operating Instructions Manual page 171

Parameter descriptions
The coordinates of the points relate, as a percentage, to the analog signal with 10 V or 20 mA and
parameter
Maximum Frequency
tion of rotation can be changed via the digital inputs and/or by selection of the points.
WARNING
Attention!
The monitoring of the analog input signal via the parameter
453 demands the check of parameter
In the settings
− "6 - Voltage, characteristic" or
− "7 - Current, characteristic"
of parameter
Operation Mode MFI1
Y (X2=98%/Y2=100%)
Pos. maximum value
50 Hz
(X1=2%/Y1=0%)
0 V
0.2 V
(0 mA)
Neg. maximum value
The characteristic can be adjusted via parameters 454 ... 457 of the application.
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
(X1=2%/Y1=100%)
0 V
0.2 V
(0 mA) 5.5 V
-40 Hz
(X2=98%/Y2=-80%)
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.
Control inputs and outputs
419 or parameter
Maximum Reference Percentage
Characteristic Curve Point X1
452, the following characteristic is effective:
Point 1:
X1 = 2.00%
Y1 = 0.00%
Point 2:
X2 = 98.00%
9.8 V
Y2 10 0.00%
=
X
+10 V
(+20 mA)
Point 1:
X1 = 2.00%
Y1 = 10 0.00%
Point 2:
+10 V
X2 = 98.00%
(+20 mA)
Y2 = − 8 0.00%
X
9.8 V
The change of direction of rotation is done in this exam-
ple at an analog input signal of 5.5 V. pos./neg. maxi-
mum figure.
Y2 - Y1
(
Y X X1
= ⋅ −
X2 - X1
171
Error/Warning Behaviour
⋅ 10 V = 0.20 V
⋅ 50.00 Hz = 0.00 Hz
⋅ 10 V = 9.80 V
50.00 Hz 5 0.00 Hz
⋅ =
⋅ 10 V = 0.20 V
⋅ 50.00 Hz = 50.00 Hz
⋅ 10 V = 9.80 V
⋅ 50.00 Hz = − 4 0.00 Hz
)
Y1
+
06/2013 Operating Instructions
519. The direc-
454.
Agile