Bedford B550-2001, Инструкция по установке и быстрому запуску

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5-29
Example 8:
This example shows how to set up the “anti-slope”, which is an inversely proportional variation
of frequency to the input analog signal, required for some applications in process control. A
sensor will generate a large signal (such as 20mA or 10V) and the AC Drive will slow or stop.
Hz
0V
4mA
10V
20mA
30
60
0
Potentiometer Scale
Max.
Output
Freq.
60Hz
Pr.03
0Hz
0V
4mA
10V
20mA
Factory Settings
Pr.03=60Hz--Max. output Freq.
Pr.48=100%--bias adjustment
Pr.49=1 -- bias polarity
Pr.50=100% -- pot. freq. gain
Pr.51=1 -- REV. motion enable
in negative bias
anti-slope
Pr.52
Motor Rated Current
a
Factory Setting: FLA
Settings 30.0% FLA to 120.0% FLA Unit: 0.1A
Factory setting is the AC drive rated current. When setting this parameter, just input the
motor rated current value without any calculation.
Use the following criteria to determine the setting of this parameter: no-load current <
rated current of motor < rated current of AC drive. You can use this parameter to limit the
output current to the motor as to prevent overheat.
Pr.53
Motor No-Load Current
a
Factory Setting: 0.4*FLA
Settings 00%FLA to 99%FLA Unit: 0.1A
The rated current of the AC drive means 100%. Setting of this parameter affects the slip
compensation. The setting value must be smaller than the motor rated current setting in
Pr.52. (this parameter displays the value of actual current.)
Pr.54 Torque Compensation
a
Factory Setting: 00
Settings 00 to 10
This parameter forces the AC drive to increase its voltage output during start-up in order
to obtain a higher initial starting torque.
Pr.55 Slip Compensation
a
Factory Setting: 0.00
Settings 0.00 to 10.00
B550
Series
sensorless vector frequency drive