Mitsubishi Electric FR-A700 Series Instruction Manual page 131

Parameter List
Parameter
Regeneration
882
avoidance
operation selection
Regeneration
883
avoidance operation
level
Regeneration
avoidance at
884
deceleration
detection sensitivity
Regeneration
avoidance
885
compensation
frequency limit value
Regeneration
886
avoidance voltage
gain
Regeneration
avoidance
665
frequency gain
888
Free parameter 1
889
Free parameter 2
891
Refer to Pr. 52.
—
126
Incre Initial
Name
ments Value
1 0
380 /
0.1V 760VDC
*
1 0
0.01Hz 6Hz
0.1% 100%
0.1% 100%
1 9999
1 9999
Range Description
0 Regeneration avoidance function invalid
Regeneration avoidance function is always
1
valid
Regeneration avoidance function is valid
2
only at constant speed
Set the bus voltage level at which
regeneration avoidance operates. When
the bus voltage level is set to low,
overvoltage error will be less apt to occur.
However, the actual deceleration time
300 to 800V
increases.
The set value must be higher than the
power supply voltage
* The initial value differs according to the
voltage level. (200V class / 400V class)
Regeneration avoidance by bus voltage
0
change ratio is invalid
Set sensitivity to detect the bus voltage
change.
1 to 5
Setting:
Detection sensitivity: Low → High
Set the limit value of frequency which rises
0 to 10Hz at activation of regeneration avoidance
function.
9999 Frequency limit invalid
Adjust responsiveness at activation of
regeneration avoidance. Setting a larger
0 to 200%
value in Pr.886 will improve responsiveness
to the bus voltage change. However, the
output frequency could become unstable.
When the load inertia of the motor is large,
0 to 200%
decrease the Pr. 886 setting. When vibration
is not suppressed by decreasing the Pr.886
setting, set a smaller value in Pr.665.
Parameters you can use for your own
0 to 9999
purposes.
Used for maintenance, management, etc.
0 to 9999
by setting a unique number to each
inverter when multiple inverters are used.
Param Param
eter
copy
: enabled
× : disabled
×
2
→
1 5
All
param
eter
eter
clear
clear
× ×
× ×