PDL D3-2.5, Instruction Manual, Page: 68 / 113

Microdrive Series Instruction Manual
4201-109 Rev I
68
62 REGENERATION MODE
Screen 62 REGEN=V-CLAMP
Description REGENERATION MODE
Options [D]YNAMIC [BRAKE]/[V]OLTAGE [CLAMP]
FUNCTION If a motor is overdriven (e.g., by decelerating
its attached load too fast) it will regenerate into
the Microdrive. Too much regeneration will
cause the Microdrive to trip out to protect itself
(fault – over voltage trip). The regeneration
mode setting controls the way in which the
Microdrive responds to the onset of
regeneration to avoid tripping out.
When set to voltage clamp mode, the Microdrive
takes evasive action by reducing the
deceleration rate as regeneration occurs. This
is the normal setting.
If a dynamic brake is fitted, this will automatically
absorb the regenerated energy. In this case
the dynamic brake mode (which takes no
evasive action) may be selected. It is not
essential to use the dynamic brake mode
when a dynamic brake is fitted – often using
the voltage clamping mode will provide an
extra level of prevention against high voltage
tripping. Dynamic braking is enabled at 730Vdc.
Voltage clamping occurs at 750Vdc.
SETTING UP If your application does not use dynamic
braking, leave set to voltage clamp. If your
application uses dynamic braking, use dynamic
brake mode only if acceptably fast response
cannot be obtained using voltage clamping.
62