Speed Control With Tacho Feedback - Lenze 482 Operating Instructions Manual

5.3

Speed control with tacho feedback

Caution!
In this operating mode, the control electronics has a simple
basic insulation. Take measures outside the controller to
ensure that the input and output signals of the control have a
double basic insulation.
• Set set-value potentiometer or master voltage to zero.
Connect mains.
LED "RSP" is illuminated.
LED "±V " is illuminated.
CC
• Set set-value potentiometer or master voltage to maximum.
• In case of master voltage operation, turn trimmer "U
clockwise until '+10 V=' are applied at measuring point "M1"
(measured across terminal 3, terminal 7, or terminal 33 = GND).
• Close switch "RFR".
LED "RSP" is not illuminated.
Caution!
In case of uncontrolled acceleration of the motor during speed
setting, immediately open switch "RFR". In this case, the
tachogenerator feedback is either missing or has incorrect
polarity.
After checking and correcting the wiring, commissioning can
be started again.
• Turn trimmer "n
" clockwise until the desired maximum speed
max
is obtained.
• Set set-value potentiometer of master voltage to zero.
• Turning trimmer "n
min
Check the adjustment of the maximum speed since trimmers
"n " and "n " influence each other.
max min
The fine setting of the maximum speed is done using trimmer
"U ".
Leit fein
• Turn trimmer "V
" clockwise, until the drive becomes unstable
p
(speed oscillations), then turn trimmer "V
counterclockwise until the drive is stable.
L
" clockwise increases the minimum speed.
" approx. 5 %
p
"
Leit grob
25