Lenze 8400 motec - Manual (Page 149)

Lenze · 8400 motec · Reference manual · DMS 4.1 EN · 08/2013 · TD05 149
5 Motor control (MCTRL)
5.10 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 C00990 .
• 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
settings.
If additional settings are necessary, proceed as follows:
2. Define the process and hence the speed range/rotational frequency range in C00991 which
is to be examined by the flying restart circuit.
• We recommend the Lenze setting "5: -n...+n | Last output frequency"
3. Adjust starting frequency in C00992 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 C00994 .
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.