Mitsubishi Electric F720PJ-11KF, Manual

Page: 40 / 96

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When setting parameters, refer to the instruction manual (applied) and understand instructions.
The inverter can be restarted without stopping the IPM motor in
the following cases:

When power comes back ON during inverter driving after an
instantaneous power failure

When the motor is coasting at start
For V/F control and General-purpose magnetic flux vector control,
refer to the previous page.

Automatic restart operation selection (Pr.162)
The inverter smoothly starts after detecting the motor speed
(frequency search) upon power restoration.
During reverse rotation, the inverter can be restarted smoothly as
the direction of rotation is detected.
 Even if the operation panel is located away from the enclosure, you
can use contact signals to perform continuous variable-speed
operation, without using analog signals.

By merely setting this parameter, you can use the acceleration,
deceleration and setting clear functions of the remote speed setter
(FR-FK).

External running frequency (other than multi-speed operation) or PU
running frequency
Without a fine parameter setting, the inverter automatically
performs energy saving operation.
This operation is optimum for fan and pump applications.

Since output voltage is controlled, output current may slightly increase.
57, 162, 611
Automatic restart after instantaneous
power failure/flying start under IPM
motor control
Pr.57 Restart coasting time
Pr.162 Automatic restart after instantaneous power failure selection
Pr.611 Acceleration time at a restart
Pr.
Number
Setting
Range
Description
57
0 No waiting time
0.1 to 5s
Set the waiting time for inverter-triggered
restart after an instantaneous power
failure.
9999
(initial value)
No restart
162
0, 1
(initial value)
With frequency search
10, 11 Frequency search at every start
611
0 to 3600s
Set the acceleration time that takes to
reach
Pr.20 Acceleration/deceleration
reference frequency setting at a restart.
9999
(initial value)
Acceleration time for restart is the normal
acceleration time (e.g.
Pr. 7 ).
IPM IPM IPM
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
)
Speed
detection time
+
Acceleration time
at a restart
(
Pr. 611
setting)
∗
The output shut off timing differs
according to the load condition.
∗
59
Remote setting function
Pr.59 Remote function selection
Pr.59 setting
Description
RH, RM, RL signal
function
Frequency setting
storage function
0 (initial value) Multi-speed setting

1 Remote setting Used
2 Remote setting Not used
3 Remote setting
Not used (Turning STF/
STR off clears
remotely-set
frequency.)
60
Energy saving control selection
Pr.60 Energy saving control selection
Pr.60 setting Description
0 (initial value) Normal operation mode
9
Optimum excitation control mode
The Optimum excitation control mode is a control
system which controls excitation current to improve
the motor efficiency to maximum and determines
output voltage as an energy saving method.

0
ON ON ON
ON
ON
ON ON ON ON
ON ON
Deceleration
(RM)
Clear (RL)
Acceleration
(RH)
Forward rotation
(STF)
Power supply
0Hz
Time
Output frequency (Hz)
∗
When
Pr. 59
= 1
When
Pr. 59
= 2, 3
When
Pr. 59
= 1, 2
When
Pr. 59
= 3
V/F V/F V/F