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106
Parameter list
Useful functions — Lifespan extension of the cooling fan (Pr.244)
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 normally on during inverter
operation. The fan switches ON/OFF according
to the temperature during a stop of the inverter
whose status is monitored.
Adjusting the output torque (current) of the motor — Slip compensation (Pr.245 to Pr.247)
245
Rated slip
0.01% 9999
0 to 50% Used to set the rated motor slip.
9999 No slip compensation
246
Slip compensation
time constant
0.01s 0.5s 0.01 to 10s
Used to set the response time of slip
compensation. When the value is smaller,
response will be faster. However, as load
inertia is greater, a regenerative overvoltage
(E.OV) error 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 is made in the constant
power range.
Motor brake and stop operation — Motor stop method and start signal selection (Pr.250)
Function assignment of external terminal and control — Start signal selection (Pr.250)
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.
When 1000s to 1100s
is set (Pr. 250 setting-
1000)s later, the motor
coasts to stop.
STF signal:
Forward rotation start
STR signal:
Reverse rotation
start
1000 to 1100s
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
Operation setting at fault occurrence — Input phase failure protection selection (Pr.251,
Pr.872)
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
1 With input phase loss protection
252, 253
Refer to Pr.73.
Parameter
Name
Incre-
ments
Initial
Value
Range Description
Parameter
copy
Parameter
clear
All parameter
clear
Related
parameters
: enabled
× : disabled
V/F
V/F
V/F
S
MFVC
S
MFVC
S
MFVC