Control Method - KEB COMBIVERT F5 Instruction Manual

Parameter Description - Control Settings

Control Method

i
When using induction motors, the TORQMAX 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) is permitted.
Running the TORQMAX 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!
72
Used in conjunction with LF.2 to adjust the control method.
Unit: 1
Value range: 0...4
Factory setting: 0
Adjustment values
0 or 1 Open loop induction motor operation for construction, inspection
and test purposes only.
2 Closed loop speed control. Valid when LF.2 = 2 or 4.
3 Closed loop speed control with pretorque input active. Valid
when LF.2 = 2 or 4 and using a load weight system to provide
a pretorque signal to the drive. Analog inputs X2A.3 and
X2A.4 serve as the pretorque input.
4 Closed loop torque control. Valid when LF.2 = 3. Both analog
inputs serve as torque inputs and are internally summed
together.