Lenze DDS Function library 9300 Servo - Manual (Page 25)

Function block library Lenze9300Servo.lib
Special functions
2.1.2 Supply−failure control (L_MFAIL)
2−15
L
Lenze9300Servo.lib EN 1.1
2.1.2.5 Fast supply power recovery (KU)
The fast supply recovery causes a restart of the controller, unless the restart protection is active. The
drive accelerates to its setpoint. If this is not wanted, you can delay the restart by wRetriggerTime
or prevent it in combination with the restart protection.
A fast supply recovery occurs:
·
Due to the system, the supply recovery is indicated by the supply−failure detection via the level
of the DC−bus voltage.
( ^ 2−7)
·
because of a "short interruption" (KU) of the utility company (e.g. in a thunderstorm).
·
Because of faulty components in the supply cables (e.g. slip−rings)
So set wRetriggerTime > the measured deceleration time that can be achieved in braking operation.
2.1.2.6 Application example
Drive network with digital frequency coupling
Stop!
Für drive networks which are connected via digital frequency (a master and one or more slaves):
·
the supply−failure detection and control must only be activated for the master.
– You must link the supply−failure control into the signal flow to meet this requirement.
·
You must operate all the controllers through the terminals +U
G
, −U
G
in a DC−bus configuration.
Observe the specifications in the System Manual Servo controller 9300", Part F.