Automatic Restart Operation After Instantaneous Power Failure/Flying Start - Mitsubishi Electric FR-A700 Manual

Pr.
Pr.
57, 58, 162 to 165, 299, 611
Automatic restart operation after instantaneous
power failure/flying start
Pr.57 Restart coasting time
Pr.162 Automatic restart after instantaneous power failure selection
Pr.163 First cushion time 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
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
Pr.
Setting Range
Number
0
57
0.1 to 5s/
0.1 to 30s
*
9999
(initial value)
58 0 to 60s
0 (initial value)
1
2
162
10
11
12
163 0 to 20s
164 0 to 100%
165 0 to 220%
0
1
299
9999
0 to 3600s
611
9999
* The setting range depends on the inverter capacity. (55K or less/75K or
more)
<Connection diagram>
MCCB MC1
R/L1
S/L2
T/L3
R1/L11
S1/L21
49
When setting parameters, refer to the instruction manual (applied) and understand instructions.
Pr.58 Restart cushion time
Pr.164 First cushion voltage for restart
Description
1.5K or less..........0.5s,
2.2K to 7.5K.........1s,
11K to 55K ...........3s
75K or more.........5s
The above times are coasting time.
Set the waiting time for inverter-triggered
restart after 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
Frequency search at every start
Reduced voltage system at every start
Encoder detection frequency 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).
MC2
MC3
U
V
IM
W
STF
CS
MC
SD
switchover
sequence
For use for only
CS
automatic restart
SD
after instantaneous
power failure or flying start,
short CS-SD in advance.
When " 0 (initial value) or 10 " is set in Pr.162, the inverter smoothly
starts after detecting the motor speed upon power restoration.
The motor starts at the motor speed and in the rotation direction
detected from the encoder at power restoration when "2 or 12" is set
in Pr.162 under encoder feedback control or vector control. (Valid
when the FR-A7AP is fitted)
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.)
V/F control, advanced magnetic flux vector control
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 Speed
+
time (Pr.57)
detection time
* The output shut off timing differs according
to the load condition.
Realsensorless vector control, vector control
Instaneous (power failure) time
Power supply
(R/L1, S/L2,
T/L3)
Motor speed N
(r/min)
Inverter output
frequency f(Hz)
*
output voltage
E(V)
Speed
Coasting
detection
+
time (Pr.57)
time
* The output shut off timing differs
according to the load condition.
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.
For real sensorless vector control, output frequency and voltage
before instantaneous power failure are output. (Pr. 58 is made invalid)
V/F control, advanced magnetic flux vector control
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 setting
* The output shut off timing differs according
to the load condition.
Realsensorless vector control
Instaneous (power failure) time
Power supply
(R/L1, S/L2,
T/L3)
Motor speed N
(r/min)
Inverter output
frequency f(Hz)
output voltage
E(V)
Coasting time
Pr.57 setting
* The output shut off timing differs
according to the load condition.
Restart cushion
time (Pr. 58 setting)
Acceleration time
at a restart
(Pr. 611 setting)
Acceleration time
at a restart
(Pr.611 setting)
*
Restart cushion
time
Pr. 58 setting
*