376
PARAMETER
2.17 Alarm function
2.17.1 Retry function [Pr. 65, 67 to 69]
(common)
If a fault occurs, the inverter resets itself automatically to
restart. You can also select the fault that causes 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 367
for the restart function.)
(1) Retry operation [Pr. 67 to 69]
Retry operation automatically resets a fault and
restarts the inverter at the starting frequency when
the time set in [
Pr. 68 Retry waiting time
] elapses after
the inverter is tripped.
Retry operation is performed by setting [
Pr. 67
≠
0]
.Set the number of retries at fault occurrence in [
Pr.
67 Number of retries at fault occurrence
]. When retries
fail consecutively more than the number of times set
in [
Pr.67
], a retry count excess fault (E.RET) occurs,
and inverter trips. (Refer to retry failure example)
Use [
Pr.68
] to set the waiting time from an inverter trip
to a retry in the range of 0 to 10s in
, 0.1 to
360s in
, and 0.1 to 600s in
. (When the
setting value is 0s, the actual time is 0.1s.)
Reading [
Pr. 69 Retry count display erase
] 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. (After retry is succeeded,
cumulative number of retry fail time is cleared.)
Writing 0 in [
Pr. 69
] clears the cumulative count.
During a retry, the Y64 signal is ON. For the Y64
signal, assign the function by setting 64 (positive
logic) or 164 (negative logic) in any of [
Pr. 190 to Pr.
196 Output terminal function selection
] .
common
[Pr. ]
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 to 10s
Set the waiting time from when an inverter trips until
a retry is made.
0.1 to 360s
0.1 to 600s
69
Retry count display erase
0
0
Clear the number of restarts succeeded by retry.
A700 F700
E700
D700
A700 F700
E700
D700
Retry failure example
Inverter
output
frequency
Fault
occurrence
First
retry Fault
occurrence
Second
retry Fault
occurrence
Third
retry
Retry failure
(E.RET)
ON
0
Fault signal
(ALM)
[
Pr.68
]
[
Pr.68
]
[
Pr.68
]
Time
Y64
ON
ON
ON
Inverter
output
frequency
0
Y64
[
Pr.68
] 5
Retry success
Retry success example
Success count + 1
Time
ON
Fault occurrence
Retry success count
Retry start
[
Pr.68
]
Summary of Contents for FR-A700 Series
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Page 440: ...474 PARAMETER MEMO ...
Page 522: ...556 SELECTION MEMO ...
