Mitsubishi Electric FR-A820-00046 Instruction Manual page 745

Parameters
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 op-
eration mode are as shown below.
Pr. 162 setting
0 (initial value) At first start Frequency search
1
2
3
10
11
12
13
Tab. 5-242: Setting of Pr. 162
Restart operation with frequency search (Pr. 162 = "0, 3, 10, 13", Pr. 299)
● When Pr. 162 = "0 (initial value, 3, 10, 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 motor 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 the
Pr. 78 "Reverse rotation prevention selection" setting.
Pr. 299 setting
: With rotation direction detection, X: Without rotation direction detection
Tab. 5-243: Rotation direction direction
● By setting "3, 13" in Pr. 162, the restart can be made smoother with even less impact than when
"0, 10" is set in Pr. 162. When the inverter is restarted with "3, 13" set to 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 page 5-67, and for details on offline auto tuning of V/F control,
refer to page 5-575.)
FR-A800
Restart Advanced magnetic flux vector control
operation
Without encoder
Reduced voltage
At first start
start
At first start Frequency search
Frequency search
At first start
(reduced impact
restart)
At every
Frequency search
start
At every Reduced voltage
start start
At every
Frequency search
start
Frequency search
At every
(reduced impact
start
restart)
9999
0 (initial value)
1
V/F control,
With encoder
Frequency search
Reduced voltage
start
Encoder detection
frequency search
Frequency search
(reduced impact
restart)
Frequency search
Reduced voltage
start
Encoder detection
frequency search
Frequency search
(reduced impact
restart)
Pr. 78 setting
0

×
 
(A) Application parameters
Real
sensorless Vector
vector control
control
Frequency
Encoder
search
detection
(reduced
frequency
impact
search
restart)
1 2
× ×
× ×

PM
sensorless
vector
control
Frequency
search for PM
motor
(Refer to
page 5-571)
5 - 565