Mitsubishi FR-D740-1.5K - Page 99

90
Parameter list
——
232 to 239
Refer to Pr.4 to Pr.6.
240
Refer to Pr.72.
241
Refer to Pr.125, Pr.126.
Increase cooling
fan life
244
Cooling fan
operation
selection
11
0
Operates at power ON
Cooling fan ON/OFF control invalid (the
cooling fan is always ON at power ON)

1
Cooling fan ON/OFF control valid
The fan is always ON while the inverter is
running. During a stop, the inverter status
is monitored and the fan switches ON-OFF
according to the temperature.
Slip compensation
245
Rated slip
0.01% 9999
0 to 50% Rated motor slip.

9999 No slip compensation
246
Slip compensation
time constant
0.01s 0.5s 0.01 to 10s
Slip compensation response time.
When the value is smaller, response will
be faster. However, as load inertia is
greater, a regenerative overvoltage trip
(E.OV) is more liable to occur.

247
Constant-power
range slip
compensation
selection
1 9999
0
Slip compensation is not made in the
constant power range (frequency range
above the frequency set in Pr. 3).

9999
Slip compensation in the constant power
range.
Ground fault
detection
249
Earth (ground)
fault detection at
start
10
0 Without ground fault detection

1 With ground fault detection
Selection of motor
stopping method and start signal
250
Stop selection
0.1s 9999
0 to 100s
The motor is coasted
to a stop when the
preset time elapses
after the start signal
is turned OFF.
STF signal: Forward
rotation start
STR signal: Reverse
rotation start

1000 to
1100s
The motor is coasted
to a stop (Pr. 250 -
1000)s after the start
signal is turned OFF.
STF signal: Start
signal
STR signal:
Forward/reverse
signal
9999
When the start signal
is turned OFF, the
motor decelerates to
stop.
STF signal: Forward
rotation start
STR signal: Reverse
rotation start
8888
STF signal: Start
signal
STR signal:
Forward/reverse
signal
Input/output phase
failure protection
selection
251
Output phase loss
protection
selection
11
0 Without output phase loss protection

1 With output phase loss protection
872
Input phase loss
protection
selection
10
0
Without input phase
loss protection
Available only for
the three-phase
power input
specification model.

1
With input phase loss
protection
Function
Parameter
Name
Incre-
ments
Initial
Value
Range Description
Parameter
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