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 Electric FR-B-750 to 75K Instruction Manual

Operation selection at power failure
and instantaneous power failure
4.13 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.
4.13.1 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 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 time
163
for restart
First cushion
164
voltage for restart
Stall prevention
165 operation level for
restart
Rotation direction
detection
299
selection at
restarting
Acceleration time
611
at a restart
* The setting range differs according to the inverter capacity. (55K or less/75K or more)
148
Parameter that must be Set
Automatic restart operation
after instantaneous power
failure/flying start
Power failure-time
deceleration-to-stop
function
Setting Range
Initial Value
FR-B
0
9999
0.1 to 5s/
0.1 to 30s
*
9999
1s 0 to 60s
0
1
2
0
10
11
12
0s 0 to 20s
0% 0 to 100%
150% 0 to 220%
0
1
0
9999
55K
5s
or less
0 to 3600s, 9999
75K 15
or more
s
Pr. 57, Pr. 58, Pr. 162 to Pr. 165,
Pr. 299, Pr. 611
Pr. 261 to Pr. 266, Pr. 294
FR-B3
⋅ 1.5K or less ................................................. 0.5s,
⋅ 2.2K to 7.5K ...........................................
⋅ 11K to 55K .............................................
⋅ 75K or more ................................................ 5.0s,
The above times are coasting time.
0.1 to Set the waiting time for inverter-triggered restart after
5s an instantaneous power failure.
No restart
Set a voltage starting time at restart.
With frequency search
Without frequency search (reduced voltage system)
Encoder detection frequency search
Frequency search at every start
Reduced voltage system at every start
Encoder detection frequency search at every start
Set a voltage starting time at restart.
Consider using these parameters according to the
load (moment of inertia, torque) magnitude.
Consider the rated inverter current as 100% and set
the stall prevention operation level during restart
operation.
Without rotation direction detection
With rotation direction detection
When Pr. 78 = "0", the rotation direction is detected.
When Pr. 78 = "1","2", the rotation direction is not
detected.
Set the acceleration time to reach the set frequency at
a restart.
Acceleration time for restart is the normal acceleration
time (e.g. Pr. 7 ) when "9999" is set.
Refer to Page
148
152
Description
1s,
3.0s,