8400 StateLine C | Reference manual
Motor control (MCTRL)
V/f control (VFCplus + encoder)
156 L Firmware ≤ 11.00 - DMS 8.0 EN - 10/2011
5.6.2 Basic settings
In order to protect the drive system, carry out the commissioning of the V/f control and the
slip regulator in several steps.
Detailed information on the single steps can be found in the following subchapters or
in the corresponding subchapters for V/f characteristic control.
Tip!
Information on the optimisation of the control mode and the adaptation to the
real application is provided in the "Optimising the control mode
" chapter for the
V/f characteristic control (VFCplus).
( 131)
Parameterisable additional functions are described correspondingly in the chapter
"Parameterisable additional functions
". ( 193)
Initial commissioning steps
1. Define the V/f characteristic:
• C00006
= 7: Linear characteristic
• C00006
= 9: Square-law characteristic
2. Defining current limits (Imax controller)
. ( 130)
3. Parameterise the encoder/feedback system.
Encoder/feedback system
( 217)
4. If special motors with a rated frequency other than 50 Hz or with a number of pole pairs ≠ 2 are used, set the
motor parameters according to the motor nameplate.
Motor selection/Motor data
( 107)
5. Define speed setpoint (e.g. 20 % of the rated speed) and enable controller.
6. Check whether the actual speed value (C00051
) ≈ speed setpoint (C00050) and then inhibit the controller
again.
• In the case of sign reversal between actual value and setpoint, check the terminals of the encoder (e.g.
swap track A or B of the encoder or reverse actual speed value).
• In case the actual value differs considerably from the setpoint (factor 2), set the motor parameters
according to motor nameplate. Then repeat step 5.
7. For protecting the drive, reduce slip regulator limitation in C00971/1
.
• e.g. reduction to half the slip frequency (≈ 2Hz)
8. Define speed setpoint (e.g. 20 % of the rated speed) and enable controller.
9. In case of a semi-stable operational performance, reduce the reset time (C00972
) or the proportional gain
(C00973
) of the slip regulator until a stable operation has been achieved.
Parameterising the slip regulator
( 157)
10. In a final step, increase the slip regulator limitation again in C00971/1
.
• e.g. increase to twice the slip frequency
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