Mitsubishi Electric FR-A720-0.4K Instruction Manual page 126

Parameter
Name
232 to 239
Refer to Pr. 4 to Pr. 6.
240
Refer to Pr. 72.
—
241
Refer to Pr. 125 and Pr. 126.
242, 243
Refer to Pr. 73.
Cooling fan
244
operation selection
245
Rated slip
Slip compensation
246
time constant
Constant-power
range slip
247
compensation
selection
250
Stop selection
Output phase loss
251
protection selection
Input phase loss
872
protection selection
252, 253
Refer to Pr. 73.
—
Incre- Initial
Range
ments Value
Operates at power on
0 Cooling fan on/off control invalid (The
cooling fan is always on at power on)
Cooling fan on/off control valid
1 1
The fan is normally on during inverter
1 operation. The fan switches on/off
according to the temperature during a stop
of the inverter whose status is monitored.
0 to 50% Used to set the rated motor slip.
0.01% 9999
9999 No slip compensation
Used to set the response time of slip
compensation. When the value is made
smaller, response will be faster. However,
0.01s 0.5s 0.01 to 10s
as load inertia is greater, a regenerative
overvoltage (E.OV ) error is more liable to
occur.
Slip compensation is not made in the
0 constant power range (frequency range
1 9999 above the frequency set in Pr. 3)
Slip compensation is made in the constant
9999
power range.
The motor is coasted
to a stop when the
0 to 100s
preset time elapses
after the start signal is
turned off.
The motor is coasted
1000 to to a stop (Pr. 250 -
1100s 1000)s after the start
signal is turned off.
0.1s 9999
9999
When the start signal
is turned off, the
motor decelerates to
stop.
8888
0 Without output phase loss protection
1 1
1 With output phase loss protection
0 Without input phase loss protection
1 0
1 With input phase loss protection
Parameter List
Description
× : disabled
STF signal:
Forward rotation
start
STR signal:
Reverse rotation
start
STF signal: Start
signal
STR signal:
Forward/reverse
signal
STF signal:
Forward rotation
start
STR signal:
Reverse rotation
start
STF signal: Start
signal
STR signal:
Forward/reverse
signal
: enabled
3
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