Mitsubishi Electric FR-D710W-0.1K, Instruction Manual

Page: 309 / 313

1/4 BCN-C22005-689
FR-D700 Series

Instruction Manual Supplement
For the FR-D700 series manufactured in March 2014 or later, the following specifications are
added. Check the serial number printed on the rating plate or on package of the inverter. (For how
to find the SERIAL number, refer to
page 2 .)
● Voltage reduction selection during stall prevention operation (Pr.154)
Pr.154 Voltage reduction selection during stall prevention operation is added
.
(1)To further prevent a trip (Pr.154)

Set Pr.154 = "11" when the overvoltage protective function (E.OV  ) activates during stall prevention
operation in an application with large load inertia. Note that turning OFF the start signal (STF/STR)
or varying the frequency signal 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.

Use regeneration avoidance function
(Pr. 882, Pr. 883, Pr. 885, Pr. 886)
. ( Refer to
Chapter 4 of the Instruction Manual (Applied) .)

Set the
Pr.22 Stall prevention operation level
correctly.
 Set Pr.154 Voltage reduction selection during stall prevention operation = "11".