26
L
After checking and correcting the wiring, commissioning can be started again.
• Switch on the mains and close switch "RFR". Turn the set-value
potentiometer to maximum or set the master voltage to V
LN
= 10 V.
Turn trimmer "n
max
" clockwise until the desired maximum motor speed is
achieved.
• Turn set-value potentiometer fully counterclockwise or set master voltge to 0
V.Turn trimmer "n
min
" clockwise until the desired minimum motor speed is
achieved.
• If the minimum speed is to be zero, turn trimmer "n
min
" counterclockwise
until the motor has just stopped running in order to avoid dead movement of
the set-value potentiometer in the low speed range.
Check the setting of the maximum speed because n
min
and n
max
influence
on each other.
• For armature voltage control with "I x R compensation" the motor speed
loss under load is compensated by turning trimmer
"I x R" clockwise.
Set trimmer "I x R" at low speed until the minimum speed change between
idle running and rated load is achieved. Then, check the setting at higher
speed and the maximum speed setting.
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