6. Description of Parameters
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6
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Analog Input
AI1 (0 to 10 V voltage input)
AI2 (0 to 10 V voltage input or 0 to 20 mA current input, determined by setting of jumper
J9)
AI3 (-10 to 10 V voltage input)
Frequency reference is entered from an analog input (AI) terminal. To input frequency
reference from an AI terminal, do as follows:
Step 1: Set AI curve.
The AC drive provides five curves to indicate mapping relationship between the input
voltage entered from AI1, AI2 or AI3 and target frequency. Three of the curves have a
linear (point-point) correspondence, and two have four-point correspondence. You can set
curves via parameters F4-13 to F4-27 and parameters in group A6, and select curves for
AI1, AI2 and AI3 in F4-33.
Here takes AI curve 1 as an example to describe how to set AI curve. AI curve 1 is set by
F4-13 to F4-16.
Figure 6-13 Set AI curve 1
Corresponding percentage
(frequency)
100.0%
0.0%
0.00 V
(0.00 mA)
F4-16
F4-14
F4-13
10.00 V
(20 mA)
F4-15
AI
F4-13 to F4-16: These five parameters set relationship between analog input and
corresponding percentage.
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When analog input voltage exceeds the value of F4-15, the AC drive uses the
maximum value.
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When analog input voltage is below the value of F4-13, the AC drive uses the
minimum value or 0.0%, determined by the setting of F4-34.
Function Code Parameter Name Setting Range Default
F4-13
AI curve 1 min. input 0.00 V to F4-15 0.00 V
F4-14
Corresponding percentage of
AI curve 1 min. input
-100.00% to 100.0% 0.0%
F4-15
AI curve 1 max. input F4-13 to 10.00 V 10.00 V
F4-16
Corresponding percentage of
AI curve 1 max. input
-100.00% to 100.0% 100.0%
Note
When an AI terminal is used for input of frequency reference, 100% of
voltage/current input corresponds to the value of F0-10 (max. frequency). If
analog input is current, 1 mA current is equal to 0.5 V voltage.
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