Operation Selection At Power Failure And Instantaneous Power Failure; Automatic Restart After Instantaneous Power Failure/Flying Start (Pr. 30, Pr. 57, Pr. 58, Pr. 96, Pr. 162, Pr. 165, Pr. 298, Pr. 299, Pr. 611) - Mitsubishi Electric FR-D720-008 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. 30, Pr. 57, Pr. 58, Pr. 96, Pr. 162, Pr. 165, Pr. 298, Pr. 299, Pr. 611)
You can restart the inverter without stopping the motor in the following cases:
When power comes back on after an instantaneous power failure
When motor is coasting at start
Parameter
Name
Number
Regenerative function
30
selection
Restart coasting time
57
58 Restart cushion time
96 Auto tuning setting/status
Automatic restart after
162 instantaneous power
failure selection
Stall prevention operation
165
level for restart
298 Frequency search gain
Rotation direction
299 detection selection at
restarting
Acceleration time at a
611
restart
The above parameters can be set when Pr. 160 Extended function display selection = "0". (Refer to page 160)
134
Parameter that should be Set
Automatic restart operation
after instantaneous power
failure/flying start
Power failure-time
deceleration-to-stop
function
Initial Value Setting Range
0, 1
0
2
0
9999
0.1 to 5s
9999
1s 0 to 60s
0
11
0
21
0
1
1
10
11
150% 0 to 200%
0 to 32767
9999
9999
0
1
0
9999
0 to 3600s
9999
9999
Pr. 30, Pr. 57, Pr. 58, Pr. 96,
Pr. 162, Pr. 165, Pr. 298, Pr. 299,
Pr. 611
Pr. 261
Description
The motor starts at the starting frequency when MRS (X10)
turns ON then OFF
Restart operation is performed when MRS (X10) turns ON
then OFF
FR-D720-070 or less, FR-D740-036 or less,
FR-D720S-070 or less, FR-D710W-042 or less ..............1s
FR-D720-100 or more, FR-D740-050 or more,
FR-D720S-100 ................................................................2s
The above times are coasting time.
Waiting time for inverter-triggered restart after an
instantaneous power failure.
No restart
Voltage starting time at restart.
Offline auto tuning is not performed
For General-purpose magnetic flux vector control
Offline auto tuning is performed without motor running (motor
constants (R1) only) (Refer to page 73)
Offline auto tuning (tuning performed without motor running)
for V/F control and automatic restart after instantaneous
power failure (with frequency search)
With frequency search
Without frequency search (reduced voltage system)
Frequency search at every start
Reduced voltage at every start
Considers the rated inverter current as 100% and sets the
stall prevention operation level during restart operation.
When offline auto tuning is performed under V/F control,
frequency search gain necessary for frequency search for
automatic restart after instantaneous power failure is set as
well as the motor constants (R1).
Uses the Mitsubishi motor (SF-JR, SF-HR, SF-JRCA, SF-
HRCA) constants
Without rotation direction detection
With rotation direction detection
When Pr. 78 = 0,
With rotation direction detection
When Pr. 78 = 1, 2
Without rotation direction detection
Acceleration time to reach Pr.20 Acceleration/deceleration
reference frequency at a restart.
Acceleration time for restart is the normal acceleration time
(e.g. Pr. 7)
Refer to Page
134
140