Mitsubishi Electric FR-A800 Series Instruction Manual page 632

 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 in the following table.
Pr.162 Restart
setting timing
0 (initial
value)
1
At first start
2
3
10
11
At every
12
start
13
1000
1001
At first start
1002
1003
1010
1011
At every
1012
start
1013
 Restart operation with frequency search (Pr.162 = "0, 3, 10, 13, 1000,
1003, 1010, or 1013", Pr.299)
• When Pr.162 = "0 (initial value), 3, 10, 13, 1000, 1003, 1010, or 1013", 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
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Automatic restart operation selection after instantaneous power failure
V/F control,
Advanced magnetic flux vector
control
Without encoder With encoder
Frequency search Frequency search
Reduced voltage Reduced voltage
start start
Encoder detection
Frequency search
frequency search
Frequency search Frequency search
(reduced impact (reduced impact
restart) restart)
Frequency search Frequency search
Reduced voltage Reduced voltage
start start
Encoder detection
Frequency search
frequency search
Frequency search Frequency search
(reduced impact (reduced impact
restart) restart)
Frequency search Frequency search
Reduced voltage Reduced voltage
start start
Encoder detection
Frequency search
frequency search
Frequency search Frequency search
(reduced impact (reduced impact
restart) restart)
Frequency search Frequency search
Reduced voltage Reduced voltage
start start
Encoder detection
Frequency search
frequency search
Frequency search Frequency search
(reduced impact (reduced impact
restart) restart)
○
×
○
search engine
Real sensorless
vector control
Frequency search
(reduced impact
restart)
Pr.78 setting
0
×
×
○
Vector PM sensorless
control vector control
Frequency
Encoder
search for PM
detection
motor
frequency
(Refer to page
search
635.)
1
×
×
○
5. PARAMETERS
5.14 (A) Application parameters
1
2
CS signal
command
source
3
selection
4
5
Always External
6
7
8
9
Determined by
the Pr.338
10
setting
2
631