Mitsubishi Electric FR-A800, Instruction Manual

Page: 745 / 1042

Parameters (A) Application parameters
FR-A800 5 - 565
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.
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.
●
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.)
Pr. 162 setting
Restart
operation
V/F control,
Advanced magnetic flux vector control
Real
sensorless
vector
control
Vector
control
PM
sensorless
vector
control
Without encoder With encoder
0 (initial value) At first start Frequency search Frequency search
Frequency
search
(reduced
impact
restart)
Encoder
detection
frequency
search
Frequency
search for PM
motor
(Refer to
page 5-571)
1 At first start
Reduced voltage
start Reduced voltage
start
2 At first start Frequency search
Encoder detection
frequency search
3 At first start
Frequency search
(reduced impact
restart) Frequency search
(reduced impact
restart)
10
At every
start
Frequency search Frequency search
11
At every
start Reduced voltage
start Reduced voltage
start
12
At every
start
Frequency search
Encoder detection
frequency search
13
At every
start
Frequency search
(reduced impact
restart) Frequency search
(reduced impact
restart)
Tab. 5-242: Setting of Pr. 162
Pr. 299 setting
Pr. 78 setting
0 1 2
9999

× ×
0 (initial value) × × ×
1
  

: With rotation direction detection, X: Without rotation direction detection
Tab. 5-243: Rotation direction direction