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Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual Page 601

Fr-a800 series.
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 Setting for the automatic restart after instantaneous power failure
operation (Pr.162)
• The Pr.162 settings and the instantaneous power failure automatic restart operation under each operation mode are as
shown below.
Pr.162
Restart
setting
operation
0 (initial value) At first start
1
At first start
2
At first start
3
At first start
10
At every start
11
At every start
12
At every start
13
At every start
 Restart operation with frequency search (Pr.162 ="0, 3, 10, or 13", Pr.299)
• When Pr.162 = "0 (initial value), 3, 10, or 13", the motor speed is detected at a power restoration so that the motor can re-
start smoothly.
• The encoder also detects the rotation direction so that the inverter can re-start smoothly even during the reverse rotation.
• Whether or not to detect the rotation direction can be selected by Pr.299 Rotation direction detection selection at
restarting. If the motor capacity is different from the inverter capacity, set Pr.299 = "0" (no rotation direction detection).
• When the rotation direction is detected, the following operation is performed according to Pr.78 Reverse rotation
prevention selection setting.
Pr.299 setting
9999
0 (initial value)
1
○: With rotation direction detection ×: Without rotation direction detection
• By setting "3 or 13" in Pr.162, the restart can be made smoother with even less impact than when "0 or 10" is set in Pr.162.
When the inverter is restarted with "3, 13" set in Pr.162, offline auto tuning is required. (For details on offline auto tuning
of Advanced magnetic flux vector control and Real sensorless vector control, refer to
auto tuning of V/F control, refer to
V/F control, Advanced magnetic flux vector control
Power supply
(R/L1, S/L2,
T/L3)
Motor speed N
(r/min)
Inverter output
frequency f(Hz)
Inverter output
voltage E(V)
Speed
Coasting
detection
+
time (Pr.57)
time
* The output shut off timing differs
according to the load condition.
600
5. PARAMETERS
5.14 (A) Application parameters
V/F control,
Advanced magnetic flux vector control
Without encoder
Frequency search
Reduced voltage start Reduced voltage start
Frequency search
Frequency search
(reduced impact
restart)
Frequency search
Reduced voltage start Reduced voltage start
Frequency search
Frequency search
(reduced impact
restart)
×
page
606.)
Instantaneous (power failure) time
*
Restart cushion
time (Pr.58 setting)
Acceleration time
at a restart
(Pr.611 setting)
Real sensorless
vector control
With encoder
Frequency search
Encoder detection
frequency search
Frequency search
(reduced impact
Frequency
restart)
search
(reduced impact
Frequency search
restart)
Encoder detection
frequency search
Frequency search
(reduced impact
restart)
Pr.78 setting
0
×
×
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)
* The output shut off timing differs
according to the load condition.
Vector control
Encoder
detection
frequency search
1
×
×
page
509, and for details on offline
Real sensorless vector control
Instantaneous (power failure) time
*
Speed
Acceleration time
detection
+
time
at a restart
(Pr.611 setting)
PM sensorless
vector control
Frequency search
for PM motor
(Refer to
page
604.)
2

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