Delta VFD-B Series, Руководство пользователя, Страница: 117 / 238

Chapter 5 Parameters
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VFD-B-P Series
5-52 Revision April 2009, SW V1.00
Example 8: Use negative slope
In this example, the use of negative slope is shown. Negative slopes are used in applications for
control of pressure, temperature or flow. The sensor that is connected to the input generates a large
signal (10V or 20mA) at high pressure or flow. With negative slope settings, the AC motor drive will
slow stop the motor. With these settings the AC motor drive will always run in only one direction
(reverse). This can only be changed by exchanging 2 wires to the motor.
Max. O utput Fr eq.
60Hz
Pr.01- 00
0Hz
0V
4mA 10V
20mA
F ac tor y Settings
Pr.01- 00=60Hz -- Max . output Fr eq.
Pr.04- 11=100%- -bias adjustment
Pr.04- 12=1 - - bias polar ity
Pr.04- 13=100% -- pot. freq. gain
Pr.04- 14=1 - - RE V. motion enable in negativ e bias
negati ve- slope
04 - 19 AVI Analog Input Delay Unit: 0.01
Settings 0.00 to 10.00 sec Factory Setting: 0.05
04 - 20 ACI Analog Input Delay Unit: 0.01
Settings 0.00 to 10.00 sec Factory Setting: 0.05
04 - 21 AUI Analog Input Delay Unit: 0.01
Settings 0.00 to 10.00 sec Factory Setting: 0.05
These input delays can be used to filter noisy analog signals.
04 - 22 Analog Input Frequency Resolution
Factory Setting: 01
Settings 00 0.01Hz
01 0.1Hz
It is used to set the unit of the resolution of frequency command when the input source is an
analog signal.