5 Motor control & motor settings
5.14 Parameterising the V/f characteristic control
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Lenze · i700 servo inverter · reference manual · DMS 3.0 EN · 06/2016 · TD06
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5.14.10 "Flying restart" function
As a protective function against high compensation currents, the i700 servo inverter provides the
flying restart function. High compensation currents may occur in the case of the V/f characteristic
control if the drive is not at standstill at the time of controller enable. The flying restart function
determines the motor speed by means of a test current and, by this information, presets the
frequency setpoint. The speed determined is also provided to the axis control.
0x2BA0 | 0x33A0 - Flying restart: Activate
Stop!
If the flying restart function is deactivated and the controller is not enabled at standstill,
the output voltage and output frequency do not match the current motor speed. High
compensation currents may flow!
• The drive is first braked towards 0 Hz and is then accelerated again!
Activation of the additional "flying restart process" function
• If the flying restart function is activated ("1: On"), a flying restart process for the determination of the current
motor speed is started automatically after the controller inhibit has been deactivated if the following conditions
are met:
• The V/f characteristic control is set as motor control.
• The CiA402 mode is selected as drive mode.
• The flying restart function is not blocked via bit 2 in the Lenze control word (0x2830
or 0x3030 for axis B).
• No DC-injection braking is active.
• No motor phase failure has been detected.
Selection list (Lenze setting printed in bold)
0Off
1On
Write access CINH OSC P RX TX UNSIGNED_8
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