Mitsubishi Electric 800 Series Instruction Manual page 518

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 Setting

[][][]0
[][][]1
Automatic restart after instantaneous power failure selection
[][][]2
[][][]3
[][]0[]
Restart timing
[][]1[]
0[][][]
CS signal command source selection under Network operation mode
1[][][]

Zero of the most significant digit is not displayed.
The setting value of Pr.162 and restart operation under each control method are as follows.

V/F control, Advanced magnetic flux
Pr.162
vector control
Setting
Without encoder
[][][]0 Frequency search
[][][]1 Reduced voltage start
[][][]2 Frequency search
Frequency search
[][][]3
(reduced impact restart)
Restart operation with frequency search (Pr.162 = "0, 3, 10, or 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
0
9999 

0 (initial value)
1 
: With rotation direction detection
Real sensorless
vector control
With encoder
Frequency search
Reduced voltage start
Frequency search
Encoder detection
(reduced impact
frequency search
restart)
Frequency search
(reduced impact restart)
Pr.78 setting
1 2
 
 
 

: Without rotation direction detection
(A) Application parameters
Description

Restart only at the first start
Restart at every start
Always External
NET (Pr.338="0")
External (Pr.338="1")
Vector control
Encoder detection
frequency search
PM sensorless
vector control
Frequency search for
a PM motor
517
PARAMETERS
5
GROUP
A