Operating instructions

Commissioning
44 Feed/Feed-Back Units BUC 624, 625
5.96024.06a Baumüller Nürnberg GmbH
6.3 Voltage/phase failure
y In the case of a mains failure, the system disables the Ready for use of the Feed/Feed back Unit.
y The Feed/Feed back Unit generates the Alert/Disturbance message.
y When the mains voltage is restored, the charging circuit must be activated by D1 (see Switch on
Sequence). After charging is completed, the Feed/Feed back Unit goes into Ready for use status.
When the charging circuit is activated, auxiliary contact X1:4,5 is open with the enable for the main
contactor being inactive.
6.4 Messages and warnings
For monitoring to function, the +24-V auxiliary voltage (X99A or X99B) must be present.
y Monitoring:
–Overcurrent
– DC link voltage
– Switching conditioning of the power transistors
– Auxiliary voltage supply
– Mains and phase failure
– Temperature
y Overcurrent Message
The system monitors the incoming current in the supply conductors and generates an overcurrent
message if the line current is exceeded by 30% of the allowed peak current. This message is saved
and results in a pulse disable. The system disables the internal and external Ready for use.
The overcurrent message is indicated by the red LED "I
max
" and can be reset by means of an exter-
nal reset.
NOTE
This message is not stored.
NOTE
Messages that are still pending cannot be cleared!
NOTE
The overcurrent message is intended as protection; the controller ensures limitation of the allowed
peak currents of the line currents.