106
Control Mode
Used in conjunction with LF.2 to adjust the control method.
Unit: 1
Value range: 0...5
Default setting: 0
Adjustment values
0 Open loop induction motor operation for construction, inspection and
test purposes only.
1 Open loop induction motor operation with sensorless motor manage-
ment, Valid when LF.2 = AbSPd, d SPd, A SPd, SErSP, bnSPd
2 Closed loop speed control. Valid when LF.2 = AbSPd, d SPd, A
SPd, SErSP, bnSPd
3 Closed loop speed control with external pre-torque input active. Valid
when LF.2 = AbSPd, d SPd, A SPd, SErSP and using a load weight
system to provide a pre-torque signal to the drive. Analog inputs
X2A.3 and X2A.4 serve as the pre-torque input. See parameters
LF.67, LF.68, and LF.69 for futher adjustment.
4 Closed loop torque control. Valid when LF.2 = A tor. Both analog
inputs serve as torque inputs and are internally summed together.
5 Closed loop speed control with synthesized pre-torque. Valid when
LF.2 = AbSPd, d SPd, A SPd, SErSP, bnSPd. Provide a synthesized
pre-torque without a load weigher. See parameters US.17, US.18,
P.LF.31 and P.LF.32 for further adjustment.
Parameter Description - Control Settings
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When using induction motors, the COMBIVERT F5 can be run open loop in
inspection to verify whether the encoder functions normally. By setting the
parameter LF.30 = 0, the inverter runs the motor open loop. The encoder
feedback (motor speed) is displayed in parameter LF.89 but has no effect on
the operation of the motor. Therefore, this mode can be used to verify whether
the encoder is functioning properly. Generally, when running empty car up the
actual motor speed in LF.89 should be equal to the set speed in LF.88. If these
values are off by more than 20 rpm when running empty car up, there is most
likely an encoder or encoder cable problem.
When using permanent magnet synchronous motors only closed loop operation
(2,3,4,5) is permitted.
Running the COMBIVERT open loop, in automatic mode, at high speed or leveling
speed can result in high motor currents and or poor performance. Always verify
that this parameter is set correctly before running in automatic mode!
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