24
L
5.2 Armature voltage control with "I x R compensation"
Caution!
In this operating mode all control terminals carry mains
potential. It is therefore necessary that all input and output
signals required for the control of the controller are safely
separated electrically by measures outside the controller and
have another protection against direct contact (double basic
insulation).
When using the supplied set-value potentiometer, the
mechanical screw fixing must have an additional PE
connection and the connections must be insulated and
covered.
• Connect motor terminal A to controller terminal 1 and motor
terminal B to controller terminal 2 (see connecting diagram).
• Set set-value potentiometer or master voltage to zero.
Connect mains.
LED "RSP" is illuminated.
LED "±V
CC
" is illuminated.
• Set set-value potentiometer or master voltage to maximum.
In case of master voltage operation, turn trimmer "U
Leit grob
"
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.
• Turn trimmer "n
max
" clockwise until the desired maximum speed
is obtained.
• Set set-value potentiometer or master voltage to zero.
• Turning trimmer "n
min
" clockwise increases the minimum speed.
Check the adjustment of the maximum speed since trimmers
"n
max
" and "n
min
" influence each other.
The fine setting of the maximum speed, is done using trimmer
"U
Leit fein
".
• Turn trimmer "V
p
" clockwise, until the drive becomes unstable
(speed oscillations), then turn trimmer "V
p
" approx. 20 %
counterclockwise until the drive is stable again.
• Set the speed stabilization at trimmer "I x R" such that the
smallest speed change results with the smallest operating
speed between idle running and rated load. Then check the
compensation for higher speeds.
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