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3.4.17 Retry function (Pr. 65, Pr. 67 to Pr. 69)
If a fault occurs, the converter resets itself automatically to restart. Fault-activating retries can be also selected.
Parameter
Name
Number
65
Retry selection
Number of retries at fault
67
occurrence
68
Retry waiting time
69
Retry count display erase
Retry success example
Pr. 68 × 4
Pr. 68
(If it is below 6s, 6s is set.)
Converter
operation
0
Retry start
Fault occurrence
Retry success count
ON
RTY
Retry failure example
Pr. 68
Converter
operation
0
First
retry
Fault
Fault
occurrence
occurrence
Fault signal
(ALM)
ON
RTY
Initial value
0
0
1s
0
Retry success
Time
Success count + 1
Pr. 68
Pr. 68
Time
Second
Third
retry
retry
Retry failure
Fault
(E.RET)
occurrence
ON
ON
ON
Description of parameters
Setting range
A fault for retry can be selected. (Refer to the
0 to 4
table in the next page.)
0
No retry function
Set the number of retries at a fault
occurrence.
1 to 10
A fault output is not provided during the retry
operation.
Set the number of retries at a fault
occurrence. (The setting value minus 100 is
101 to 110
the number of retries.)
A fault output is provided during the retry
operation.
Set the waiting time from when a converter
0 to 360s
fault occurs until a retry is made.
Clear the number of restarts succeeded by
0
retries.
Retry operation automatically resets a fault and restarts
the converter when the time set in Pr. 68 elapses after the
converter trip.
Retry operation is performed when Pr. 67 "0". Set the
number of retries at a fault occurrence to 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 a converter trip. (Refer to the Retry
failure example.)
Use Pr. 68 to set the waiting time from when the converter
trips until a retry is made in the range of 0 to 360s. (When
the setting value is "0s", the actual time is 0.1s.)
Reading the Pr. 69 value provides the cumulative number
of successful restart times made by retries.
The cumulative count in Pr. 69 increases by 1 when a retry
is successful. Retry is regarded as successful when
normal operation continues without a fault for the Pr. 68
setting multiplied by four or longer (6s at the shortest).
(When retry is successful, cumulative number of retry
failure is cleared. )
Writing "0" in Pr. 69 clears the cumulative count.
During a retry, RTY signal is ON. For RTY signal, assign
the
function
by
setting
"111(negative logic)" in any of Pr. 11 to Pr. 16 (output
terminal function selection).
NOTE
Changing the terminal assignment using Pr. 11 to
Pr. 16 (output terminal function selection) may affect
other functions. Set parameters after confirming
the function of each terminal.
Description
"11
(positive
logic)"
or
91
3
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