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indicates simple mode parameters and indicates extended parameters. When setting parameters, refer to the instruction manual (applied) and understand instructions.
Pr.
Pr.
You can restart the inverter without stopping the motor in the
following cases.
⋅ when commercial power supply operation is switched to inverter
operation
⋅ when power comes back on after an instantaneous power failure
⋅ when motor is coasting at start
* The setting range varies according to the inverter capacity. (55K or less/
75K or more)
When “0 (initial value) or 10” is set in Pr. 162, the inverter smoothly
starts after detecting the motor speed upon power restoration.
Even when the motor is rotating in the opposite direction, 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 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.
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 motorized speed
setter (FR-FK).
* External runnning frequency (other than multi-speed operation) or PU
running frequency
Restart operation after instantaneous power failure / Flying start
Pr.57 Restart coasting time Pr.58 Restart cushion time
Pr.162 Automatic restart after instantaneous power failure selection
Pr.163 First cushion time for restart
Pr.164 First cushion voltage for restart
Pr.165 Stall prevention operation level for restart
Pr.299 Rotation direction detection selection at restarting
Pr.611 Acceleration time at a restart
Pr.
Number
Setting Range Description
57
0
1.5K or less..........0.5s,
2.2K to 7.5K.........1s,
11K or more ........3.0s
75K or more ........5.0s
The above times are coasting time.
0.1 to 5s/
0.1 to 30s
*
Set the waiting time for inverter-triggered
restart after an instantaneous power
failure.
9999 (initial value) No restart
58 0 to 60s Set a voltage starting time at restart.
162
0 (initial value) With frequency search
1
Without frequency search (reduced
voltage system)
10 Frequency search at every start
11 Reduced voltage system at every start
163 0 to 20s Set a voltage starting time at restart.
Consider using these parameters
according to the load (inertia moment,
torque) magnitude.
164 0 to 100%
165 0 to 150%
Consider the rated inverter current as
100% and set the stall prevention
operation level during restart operation.
299
0 Without rotation direction detection
1 With rotation direction detection
9999
When Pr. 78 =0, the rotation direction is
detected.
When
Pr. 78 =1,2, the rotation direction is
not detected.
611
0 to 3600s
Set the acceleration time to reach the set
frequency at restart.
9999
Acceleration time for restart is the normal
acceleration time (e.g. Pr. 7).
<Connection diagram>
Pr.
57, 58, 162 to 165, 299, 611
STF
IM
MCCB
CS
CS
S1/L21
R1/L11
T/L3
S/L2
R/L1
MC1
MC2
MC3
W
V
U
For use for only
automatic restart
after instantaneous
power failure or flying start,
short CS-SD in advance.
MC
switchover
sequence
SD
SD
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 Yes
2 Remote setting No
3 Remote setting
No
(Turning STF/STR off
clears remotely-set
frequency.)
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)
Restart cushion
time (Pr. 58 setting)
When Pr. 162 = 0, 10 (with frequency search)
* The output shut off timing differs according
to the load condition.
*
Instantaneous (power failure) time
Coasting time
Pr. 57 setting
Restart cushion
time
Pr. 58 setting
When Pr. 162 = 1, 11 (without frequency search)
Power supply
(R/L1,S/L2,T/L3)
Motor speed N
(r/min)
Inverter
output frequency
f (Hz)
Inverter
output voltage
E (V)
* The output shut off timing differs according
to the load condition.
*
Pr.
59
Deceleration
(RM)
Clear (RL)
Acceleration
(RH)
Forward
rotation (STF)
ON
ON
Power supply
ON
0Hz
*
ON
ON
ON
ON
ON
ON
When Pr. 59 = 1
When Pr. 59 = 2, 3
ON
ON
Output frequency
(Hz)
When Pr. 59 = 1, 2
When Pr. 59 = 3
Time