Lenze 8400 User Manual

5 Motor control (MCTRL)
5.6 V/f control (VFCplus + encoder)
188
Lenze · 8400 HighLine · Reference manual · DMS 12.0 EN · 06/2017 · TD23
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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 further 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).
( 163)
Parameterisable additional functions are described correspondingly in the chapter
"Parameterisable additional functions
". ( 258)
Initial commissioning steps
1 Define the V/f characteristic:
• C00006
= 7: Linear characteristic
• C00006
= 9: Quadratic characteristic
2. Defining current limits (Imax controller)
. ( 162)
3. Parameterise encoder/feedback system.
Encoder/feedback system
( 276)
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
( 135)
5th Define speed setpoint (e.g. 20 % of the rated speed) and enable inverter.
6. Check whether the actual speed value (C00051
) ≈ speed setpoint (C00050) and then inhibit the inverter
again.
• In case of a sign reversal between actual value and setpoint, check the connection of the encoder (e.g.
change track A or B of the encoder or invert the 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.
6. To protect the drive, reduce the 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 inverter.
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
( 189)
10 In a final step, increase the slip regulator limitation again in C00971/1
.
• e.g. increase to twice the slip frequency

Lenze 8400 Specifications

General

Category	DC Drives
Series	8400
Protection class	IP20
Control Type	Vector control
Communication	CANopen, PROFIBUS, Ethernet
Protection Features	Overcurrent, overvoltage, undervoltage, overtemperature
Input Voltage	AC 230/400/480 V