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.
Voltage reduction selection during stall prevention operation (Pr.154)
selection during stall
Set Pr.154 = "11" when the overvoltage protective function (E.OV
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.
Causes and corrective actions
Regenerative overvoltage trip during acceleration
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 for too slow acceleration. (e.g. during downward acceleration in
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
Decrease the acceleration time.
Check that regeneration avoidance function (Pr. 882, Pr. 883, Pr. 885, Pr. 886)
Set the Pr.22 Stall prevention operation level correctly.
Set Pr.154 Voltage reduction selection during stall prevention operation = "11".
vertical lift load)
application with a large load inertia.
Does not suppress the
) is activated
OV During Acc