5motor control (mctrl) – Lenze 8400 BaseLine C User Manual
Page 95
Lenze · 8400 BaseLine C · Reference manual · DMS 1.6 EN · 01/2014 · TD05
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5
Motor control (MCTRL)
5.6
Parameterisable additional functions
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How to parameterise the flying restart function:
1. Activate the flying restart circuit by selecting "1: On" in
.
• Every time the controller is enabled, a synchronisation to the rotating or standing drive
is carried out.
When the Lenze setting is used, most applications do not require additional controller set-
tings.
If additional settings are necessary, proceed as follows:
2. Define the process and hence the speed range/rotational frequency range in
which is
to be examined by the flying restart circuit.
• We recommend the Lenze setting "5: -n...+n | Last output frequency"
3. Adjust setting in
if required.
The preset starting frequency which defines the starting point of the flying restart function
is optimised for standard motors.
• We recommend to define a starting frequency of approximately 20 % of the rated motor
frequency to enable a safe and fast connection to standing drive systems.
4. Set the flying restart current in
.
We recommend setting a flying restart current of 10 % ... 25 % of the rated motor current.
• During a flying restart process, a current is injected into the motor to identify the speed.
• Reducing the current causes a reduction of the motor torque during the flying restart
process. A short-time starting action or reversing of the motor is prevented with low
flying restart currents.
• An increase of the current improves the robustness of the flying restart function.