Programming
890CS Common Bus Supply - Frames B & D; 890CD Common Bus Drive and 890SD Standalone Drive - Frames B, C & D
Page
D-133
8
9
10
A
B
C
D
E
1
2
3
4
5
6
7
REGEN CONTROL
SETUP::MOTOR CONTROL::REGEN CNTRL
Designed for 4Q Regen Control Mode.
This function block is used to setup, sequence and monitor the operation of the drive when used in 4Q Regen Control Mode.
Parameter Descriptions
PRECHARGE CLOSED
PREF: 114.01
Default: TRUE
Range: FALSE / TRUE
This parameter is used to indicate the external precharge contactor is closed, i.e. the external precharge resistor is no longer in
circuit.
DC VOLTS DEMAND
PREF: 114.02
Default: 720V
Range: 0 to 1000V
Use this to set the demanded dc link volts for the common dc bus. It must be set higher than the peak of the mains supply, but
lower than the overvolts (820V on 400V products, 410V on 230V products).
BRAKE MODE
PREF: 114.15
Default: FALSE
Range: FALSE / TRUE
Setting this parameter True allows the drive to generate energy into the mains in common dc link systems. The regeneration
occurs when the dc link is higher than the DC VOLTS DEMAND level. In this mode the drive will not draw energy from the
mains. The drive acts purely as a braking unit.
SYNCHRONIZING
PREF: 114.09
Default: FALSE
Range: FALSE / TRUE
This diagnostic reads True during the mains synchronisation period. This occurs when the drive is first run in 4Q Regen
Control Mode. This synchronising period lasts for 100ms.
SYNCHRONIZED
PREF: 114.10
Default: FALSE
Range: FALSE / TRUE
This diagnostic reads True when mains synchronisation has been successfully completed.
PHASE LOSS
PREF: 114.11
Default: FALSE
Range: FALSE / TRUE
This diagnostic reads True if the drive suspects there is a missing input phase from the mains supply.
