Lenze i700 - Manual (Page 142)

5 Motor control & motor settings
5.14 Parameterising the V/f characteristic control
142
Lenze · i700 servo inverter · Reference manual · DMS 1.5 EN · 03/2014 · TD05
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[5-11] Voltage boost for a linear V/f characteristic (left) and square-law V/f characteristic (right)

Tip!
For magnetising the motor, consider a sufficient time from the controller enable to the
start of the speed ramp function generator.
• The bigger the motor the longer the time required for magnetisation. A motor with a
power of 90 kW requires up to 2 seconds.
0x2B06 | 0x3306 - VFC: Voltage boost
5.14.4 Setting the load adjustment
0x2B07 | 0x3307 - VFC: Load adjustment parameter
0
0
U
Boost
0
0
U
Boost
f
set
V V
f
set
Frequency at ref. point
Voltage at ref. point Voltage at ref. point
Frequency at ref. point
Voltage boost
Setting range (min. value | unit | max. value) Lenze setting
0.0 V 100.0 0.0 V
 Write access  CINH  OSC  P  RX  TX Scaling: 1/10 UNSIGNED_16

Stop!
If the load adjustment is too high, the motor current may increase in idle state and the
motor may overheat!
Sub. Name Lenze setting Data type
 1 VFC: Load adjustment - direction of rotation 0: Passive load (e.g. friction) UNSIGNED_8
 2 VFC: Load adjustment - value 20.00 % UNSIGNED_32
Subindex 1: VFC: Load adjustment - direction of rotation
Adaptation of the characteristic depending on the load in the case of CW and CCW rotation
Selection list
(Lenze setting printed in bold) Info
0 Passive load (e.g. friction) The motor operates in motor mode in both directions.
1 Active load, CCW (e.g. hoist) Application example: Hoist without counterweight
2 Active load, CW (e.g. hoist) Application example: Dancer-controlled unwinder
 Write access  CINH  OSC  P  RX  TX UNSIGNED_8