Control Mode - KEB COMBIVERT F5 Instruction Manual

Parameter Description - Control Settings
Control Mode
i
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!
6
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
management, 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 pre-torque input active. Valid when
LF.2 = AbSPd, d SPd, A SPd 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.
Closed loop torque control. Valid when LF.2 = A tor. Both ana-
4
log inputs serve as torque inputs and are internally summed to-
gether.
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, US.31 and US.32 for further adjustment.