Danfoss Vacon NXP Applications Manual page 75

Description of parameters
2.4.3.5 AI1 signal inversion
2.4.4.5 AI2 signal inversion
2.4.5.5 AI3 signal inversion
2.4.6.5 AI4 signal inversion
The signal inversion function is useful for example in a situation where PLC sends power
limit to the drive by using analogue inputs. If PLC is unable to communicate to the drive,
the power limit is normally zero. When an inverted signal logic is used, a zero value from
PLC means maximum power limit. This allows you to run the drive, for example, from
the keypad without changing the power limit parameters.
0 = No inversion
1 = Signal inverted
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AI3/AI4 Output
100 %
0 %
40 % Analogue
0 %
Custom Input
Min
Figure 21.
ID387 "AI1 Signal Inv"
ID398 "AI2 Signal Inv"
ID151 "AI3 Signal Inv"
ID162 "AI3 Signal Inv"
AI3/AI4 Output
40 % Analogue
0 %
Custom Input
Min
Figure 22.
80 %
100 %
Custom
Max
80 %
100 %
Custom
Max
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