Operation Selection At Power Failure And Instantaneous Power Failure; Automatic Restart After Instantaneous Power Failure / Flying Start (Pr. 57, Pr. 58, Pr. 162 To Pr. 165, Pr. 299, Pr. 611) - Mitsubishi FR-F720-00046-NA Instruction Manual

Operation selection at power failure and
instantaneous power failure
4.12 Operation selection at power failure and instantaneous
power failure
Purpose
At instantaneous power failure
occurrence, restart inverter without
stopping motor
When undervoltage or a power
failure occurs, the inverter can be
decelerated to a stop.
4.12.1 Automatic restart after instantaneous power failure / flying start
(Pr. 57, Pr. 58, Pr. 162 to Pr. 165, Pr. 299, Pr. 611)
You can restart the inverter without stopping the motor in the following cases.
⋅ when bypass operation is switched to inverter operation
⋅ when power comes back ON after an instantaneous power failure
⋅ when motor is coasting at start
Parameter
Name
Number
Restart coasting
57
time
Restart cushion
58
time
Automatic
restart after
162 instantaneous
power failure
selection
First cushion
163
time for restart
First cushion
164 voltage for
restart
Stall prevention
165 operation level
for restart
Rotation
direction
299 detection
selection at
restarting
Acceleration
611
time at a restart
The above parameters can be set when Pr. 160 User group read selection = "0". (Refer to page 192)
*1 When Pr. 570 Multiple rating setting = "1", performing inverter reset and all parameter clear changes the initial value and setting range. (Refer to page 86.)
154
Parameter that must be Set
Automatic restart operation
after instantaneous power
failure / flying start
Power failure-time
deceleration-to-stop
function
Initial Value Setting Range
200V class 200V class
(400V class) (400V class)
9999
02330 (01160)
or lower
03160 (01800)
or higher
1s 0 to 60s
0
0s 0 to 20s
0% 0 to 100%
110% 0 to 120%
*1
9999
02330 (01160)
5s
or lower
0 to 3600s, 9999
03160 (01800)
15s
or higher
Pr. 57, Pr. 58, Pr. 162 to Pr. 165,
Pr. 299, Pr. 611
Pr. 261 to Pr. 266
200V class (400V class)
FR-F720-00077 (FR-F740-00038) or lower.....0.5s
FR-F720-00105 to 00340
(FR-F740-00052 to 00170).............................1s
0
FR-F720-00490 to 02330
(FR-F740-00250 to 01160) ............................3.0s
FR-F720-03160 (FR-F740-01800) or higher ...5.0s
The above times are coasting time.
0.1 to
5s
Set the waiting time for inverter-triggered restart
after an instantaneous power failure.
0.1 to
30s
9999 No restart
Set a voltage starting time at restart.
0 Frequency search only performed at the first start
Reduced voltage start only performed at the first
1
start (no frequency search)
10 Frequency search at every start
Reduced voltage system at every start (no
11
frequency search)
Set a voltage starting time at restart.
Consider using these parameters according to the
load (moment of inertia, torque) magnitude.
Considers the rated inverter current as 100% and
set the stall prevention operation level during
*1
restart operation.
0 Without rotation direction detection
1
With rotation direction detection
When Pr. 78="0", the rotation direction is detected.
9999
When Pr. 78="1", "2", the rotation direction is not
detected.
Set the acceleration time to reach
Acceleration/deceleration reference frequency at a
restart.
Acceleration time for restart is the normal acceleration
time (e.g. Pr. 7) when "9999" is set.
Refer to Page
154
158
Description
Pr. 20