Commissioning
5.4 Quick commissioning with a PC.
Converter with the CU240B-2 and CU240E-2 Control Units
158 Operating Instructions, 01/2016, FW V4.7 SP6, A5E34259001B AC
Select a suitable control mode
U/f control or flux current control (FCC)
Sensorless vector control
Motors that can
be operated
Induction motors Induction and synchronous motors
Power Modules
that can be op-
erated
No restrictions
• Pumps, fans, and compressors with flow char-
acteristic
• Wet or dry blasting technology
• Mills, mixers, kneaders, crushers, agitators
• Horizontal conveyor technology (conveyor
belts, roller conveyors, chain conveyors)
• Basic spindles
• Pumps and compressors with displacement
machines
• Rotary furnaces
• Extruder
• Centrifuge
• Typical correction time after a speed change:
100 ms … 200 ms
• Typical correction
time after a load
surge: 500 ms
• The control mode is
suitable to address
the following re-
quirements:
– Motor power
ratings < 45 kW
– Ramp-up time
0 → Rated speed (dependent on the rated
motor power): 1 s (0.1 kW) … 10 s (45 kW)
– Applications with constant load torque
without load surges
• Die Regelungsart is insensitive with respect to
imprecise setting of the motor data
• Typical correction time after a speed change:
< 100 ms
• Typical correction
time after a load
surge: 200 ms
• The control mode
controls and limits
the motor torque
• Torque accuracy
that can be
achieved: ± 5 % for
15 % … 100 % of
the rated speed
• We recommend the control mode for the fol-
lowing applications:
– Motor power ratings > 11 kW
– For load surges of 10 % … >100 % of the
rated motor torque
• The control mode is necessary for a ramp-up
time 0 → Rated speed (dependent on the rated
motor power):
< 1 s (0.1 kW) … < 10 s (250 kW).
550 Hz 240 Hz
Closed-loop
torque control
Without torque control Torque control with and without higher-level speed
• Contrary to encoderless vector control, the
speed controller does not have to be set
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