Mitsubishi Electric FR-E710W-0.1K, Instruction Manual

Page: 345 / 349

1/4 BCN-C22005-679
FR-E700 Series
Instruction Manual Supplement
For the FR-E700 series manufactured in December 2014 or later, the
following specifications are added. Check the serial number printed
on the rating plate of the inverter.
(1) Voltage reduction selection during stall prevention operation (Pr.154)
 Set Pr.154 = "11" when the overvoltage protective function (E.OV

) is activated
during stall prevention operation in an application with large load inertia. Note that
turning OFF the start signal (STF/STR) or varying the frequency command during
stall prevention operation may delay the acceleration/deceleration start.
(2) Causes and corrective actions
Parameter
Number
Name
Initial
Value Setting
Range
Description
154
Voltage reduction
selection during stall
prevention operation
1
1
Does not suppress the
overvoltage protective
function
11
Suppresses the
overvoltage protective
function
Operation
panel
indication
E.OV1
FR-PU04
FR-PU07
OV During Acc
Name
Regenerative overvoltage trip during acceleration
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 and the
inverter trips. The circuit may also be activated by a surge voltage produced in
the power supply system.
Check point
 Check for too slow acceleration. (e.g. during downward acceleration in
vertical lift load)
 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
 Decrease the acceleration time.
 Check that regeneration avoidance function ( Pr. 882 , Pr. 883 , Pr. 885 , Pr. 886 )
is used.
 Set the Pr.22 Stall prevention operation level correctly.
 Set Pr.154 Voltage reduction selection during stall prevention operation = "11".
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