Filter
Top Products
158
Operation setting at fault occurrence
5.14 Operation setting at fault occurrence
5.14.1 Retry function (Pr. 65, Pr. 67 to Pr. 69)
Retry operation automatically resets a fault and restarts
the inverter at the starting frequency when the time set in
Pr. 68 elapses after the inverter is tripped.
Retry operation is performed by setting Pr. 67 to any value
other than "0". Set the number of retries at fault
occurrence in Pr. 67.
When retries fail consecutively more than the number of
times set in Pr. 67, a retry count excess fault (E.RET)
occurs, resulting in inverter trip. (Refer to retry failure
example)
Use Pr. 68 to set the waiting time from when the inverter
trips until a retry is made in the range 0.1 to 360s.
Reading the Pr. 69 value provides the cumulative number
of successful restart times made by retry.
The cumulative count in Pr. 69 is increased by 1 when a
retry is regarded as successful after normal operation
continues without faults occurring for more than four times
longer than the time set in Pr. 68 after a retry start.
(When retry is successful, cumulative number of retry
failure is cleared.)
Writing "0" to Pr. 69 clears the cumulative count.
Purpose Parameter that should be Set Refer to Page
Recover by retry operation at a fault
occurrence
Retry operation Pr. 65, Pr. 67 to Pr. 69
158
Do not output input/output phase
failure alarm
Input/output phase failure
protection selection
Pr. 251, Pr. 872
160
Detect an earth (ground) fault at
start
Earth (ground) fault
detection at start
Pr. 249
160
Select the operation at a fault
occurrence
Communication error
occurrence count display
Pr. 501
161
If a fault occurs, the inverter resets itself automatically to restart. You can also select the fault for a retry.
When you have selected automatic restart after instantaneous power failure (Pr. 57 Restart coasting time ≠ 9999), restart
operation is performed at the retry operation time which is the same of that of a power failure. (Refer to page 151 for the
restart function.)
Parameter
Number
Name
Initial
Value
Setting
Range
Description
65 Retry selection
0 0 to 5 A fault for retry can be selected. (Refer to the next page)
67
Number of retries at fault
occurrence
0
0 No retry function
1 to 10
Set the number of retries at fault occurrence.
A fault output is not provided during retry operation.
101 to 110
Set the number of retries at fault occurrence. (The setting
value of minus 100 is the number of retries.)
A fault output is provided during retry operation.
68 Retry waiting time
1s 0.1 to 360s
Set the waiting time from when an inverter fault occurs
until a retry is made.
69 Retry count display erase
0 0 Clear the number of restarts succeeded by retry.
The above parameters can be set when Pr. 160 User group read selection = "0". (Refer to page 167)
Retry failure example
Inverter output
frequency
Fault
occurrence
Fault
occurrence
Fault
occurrence
First retry Second retry Third retry
Retry failure
(E.RET)
ON
0
Fault signal
(ALM)
Pr. 68 Pr. 68 Pr. 68
Inverter output
frequency
0
Pr. 68
Pr. 68 5
Retry success
Retry success example
Success count + 1
Time
Fault occurrence
Retry success count
Retry start
Time