Lenze E82xVxxxKxxxxx - Manual (Page 276)

Function library
Behaviour in the event of mains switching, mains failure or controller inhibit
Start conditions/flying−restart circuit
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276 EDS82EV903 EN 3.0
Flying restart
With the selection of the flying restart(C0143) you define whether the controller searches
for the motor speed after the restart or adds a signal.
Searching for the motor speed (C0143 = 0, C0143 = 1)
The drive starts if the momentary motor speed has been found. The acceleration is steady
and smooth
)
Note!
ƒ The flying−restart circuit must not be used if several motors with different
rotating masses are connected to a controller.
ƒ The flying restart method is safe and reliable for drives with great rotating
masses.
ƒ With machines with low moments of inertia and small friction, the motor
can restart for a short time or reverse after controller enable.
ƒ The controller only searches the given direction of rotation.
ƒ The controller calculates the output frequency required for the current speed of the
idling motor, is connected and accelerates the motor until it reaches its setpoint.
Adding a signal (C0143 = 2, C0143 = 3)
The controller adds the output frequency corresponding to the frequency setpoint or the
actual process controller value.
)
Note!
The actual process controller value must only be set if a speed−proportional
signal is available in C0412/5!
Tip
If the flying−restart circuit is not required for every drive start, but only after mains
reconnection:
ƒ Bridge X3/28 with HIGH level and start the controller with the function QSP"
(C0142 = 3 and C0106 = 0 s).
ƒ The flying−restart circuit is now only activated for for the first mains connection.