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BCN-C22005-679
Operation
panel
indication
E.OV2
FR-PU04
FR-PU07
Stedy Spd OV
Name
Regenerative overvoltage trip during constant speed
Description
If regenerative energy causes the inverter's internal main circuit DC voltage to
reach or exceed the specified value, the protective circuit is activated to stop
the inverter output. The circuit may also be activated by a surge voltage
produced in the power supply system.
Check point
Check for sudden load change.
Check that the setting of
Pr. 22 Stall prevention operation level
is not too small.
Check if the stall prevention operation is frequently activated in an
application with a large load inertia.
Corrective
action
Keep load stable.
Check that regeneration avoidance function (
Pr. 882
,
Pr. 883
,
Pr. 885
,
Pr. 886
)
is used.
Use the brake resistor, brake unit or power regeneration common converter
(FR-CV) as required.
Set the
Pr.22 Stall prevention operation level
correctly.
Set
Pr.154 Voltage reduction selection during stall prevention operation
= "11".
Operation
panel
indication
E.OV3
FR-PU04
FR-PU07
OV During Dec
Name
Regenerative overvoltage trip during deceleration or stop
Description
If regenerative energy causes the inverter's internal main circuit DC voltage to
reach or exceed the specified value, the protective circuit is activated to stop
the inverter output. The circuit may also be activated by a surge voltage
produced in the power supply system.
Check point
Check for sudden speed reduction
Check if the stall prevention operation is frequently activated in an
application with a large load inertia.
Corrective
action
Increase the deceleration time. (Set the deceleration time which matches the
moment of inertia of the load)
Longer the brake cycle.
Use regeneration avoidance function (
Pr. 882
,
Pr. 883
,
Pr. 885
,
Pr. 886
).
Use the brake resistor, brake unit or power regeneration common converter
(FR-CV) as required.
Set
Pr.154 Voltage reduction selection during stall prevention operation
= "11".
BCN-C22005-679.fm 2 ページ ２０１４年１１月７日 金曜日 午前１１時５８分
