11-12 Control Circuits for the Mains Connection Rexroth IndraDrive
DOK-INDRV*-SYSTEM*****-PR02-EN-P
Control by the Control Unit
If the mains contactor is controlled by the control unit, the drive, in the
case of E-Stop or when the drive-internal monitor triggers, can be shut
down in a position-controlled way by a control unit.
This kind of mains contactor control is mainly used for electronically
coupled drives that are shut down synchronously even in the case of
mains failure.
The DC bus voltage is not short-circuited so that there is energy available
for position-controlled shutdown of the drives.
Note: The energy stored in the DC bus or the regenerated energy
has to be greater than the energy required for excitation of
asynchronous machines or for return motions.
The parameter "Activation of NC reaction on error" has to be set
accordingly in the drive controller (P-0-0117, bit 0=1).
In the case of E-Stop or when the monitors of the supply unit trigger (e.g.
mains failure), the drives are shut down in a position-controlled way by the
positioning control.
When the E-Stop circuit opens or the monitors of the supply unit trigger
(e.g. mains failure), the mains contactor in the supply unit drops out.
For drives with SERCOS interface the error is signaled to the control unit
and the drives can be shut down in a position-controlled way.
For drives without SERCOS interface the control unit has to evaluate the
UD contact. When the UD contact triggers, the control unit has to shut
down the drives.
CAUTION
Damage to machines caused by unbraked
coasting to stop of the drives in case DC bus
voltage is too low!
⇒
The control unit should evaluate the UD contact and
shut the drives down when the contact triggers.
Application
Features
Operating Principle
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