Mitsubishi Electric FR-F740-00023-EC Instruction Manual page 126

15ms to 100ms
Power
ON
OFF
supply
IPF
OFF
When Pr. 162 = 0, 10 (with frequency search)
Instantaneous (power failure) time
Power supply
(R/L1,S/L2,T/L3)
Motor
speed N (r/min)
Inverter
*
output frequency
f (Hz)
Inverter
output voltage
E (V)
Coasting Speed
+
time (Pr.57) detection time
* The output shut off timing differs according
to the load condition.
When Pr. 162 = 1, 11 (without frequency search)
Instantaneous (power failure) time
Power supply
(R/L1,S/L2,T/L3)
Motor speed N
(r/min)
Inverter
*
output frequency
f (Hz)
Inverter
output voltage
E (V)
Coasting time
Pr. 57 setting
* The output shut off timing differs according
to the load condition.
(1) Automatic restart after instantaneous power failure operation
⋅ When Instantaneous power failure protection (E.IPF) and undervotage
protection (E.UVT) are activated, the inverter output is shut off. (Refer to page
241 for E.IPF and E.UVT.)
When automatic restart after instantaneous power failure operation is set, the
ON
motor can be restarted if power is restored after an instantaneous power failure
and under voltage. (E.IPF and E.UVT are not activated.)
⋅ When E.IPF and E.UVT are activated, instantaneous power failure/under
voltage signal (IPF) is output.
⋅ The IPF signal is assigned to the terminal IPF in the initial setting. The IPF signal
can also be assigned to the other terminal by setting "2 (positive logic) or 102
(negative logic)" to any of Pr. 190 to Pr. 196 (output terminal function selection).
(2) Automatic restart operation selection (Pr. 162, Pr. 299)
With frequency search
When "0 (initial value), 10" is set in Pr. 162, the inverter smoothly
starts after detecting the motor speed upon power restoration.
⋅ During reverse rotation, the inverter can be restarted smoothly as
the direction of rotation is detected.
⋅ You can select whether to make rotation direction detection or not
with Pr. 299 "Rotation direction detection selection at restarting".
When capacities of the motor and inverter differ, set "0" (without
rotation direction detection) in Pr. 299.
Restart cushion
time (Pr. 58 setting)
Acceleration time
at a restart
(Pr. 611 setting)
⋅ When the inverter capacity is two rank or more larger than the motor
⋅ If two or more motors are connected to one inverter, the inverter
⋅ Since the DC injection brake is operated instantaneously when the
⋅ When reverse rotation is detected when Pr. 78=
Without frequency search
When Pr. 162 = "1" or "11", automatic restart operation is performed
in a reduced voltage system, where the voltage is gradually risen
with the output frequency unchanged from prior to an instantaneous
power failure independently of the coasting speed of the motor.
⋅ This system stores the output frequency prior to an instantaneous
⋅ Restart operation at every start
When Pr. 162 = "10" or "11", automatic restart operation is
Restart cushion also performed every start, in addition to the automatic restart
time
after instantaneous power failure. When Pr. 162 = "0" or "1",
Pr. 58 setting
automatic restart operation is performed at the first start after
power supply-on, but the inverter starts at the starting
frequency at the second time or later.
Operation selection at power failure
and instantaneous power failure
Pr.299 Setting
9999 (initial value)
0
1
REMARKS
capacity, the inverter may not start due to overcurrent (OCT) alarm.
functions abnormally. (The inverter does not start smoothly.)
speed is detected at a restart, the speed may reduce if the inertia
moment (J) of the load is small.
disabled), the rotation direction is changed to forward rotation after
decelerates in reverse rotation when the start command is forward
rotation. The inverter will not start when the start command is
reverse rotation.
REMARKS
power failure and increases the voltage. Therefore, if the
instantaneous power failure time exceeds 0.2s, the inverter starts at
Pr. 13 Starting frequency (initial value = 0.5Hz) since the stored output
frequency cannot be retained.
Pr.78 Setting
0 1 2
× ×
× × ×
:with rotation direction detection
×
with rotation direction detection
:
" "
1 (reverse rotation
3
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