(H) Protective function parameter
327
5
GROUP
H
5.10.7
Retry function
Setting the retry function (Pr.67, Pr.68)
• When the inverter protective function is operating (fault indication), the retry function automatically cancels (resets) the
protective function after the time set in
Pr.68
. The retry function then restarts the operation from the starting frequency.
• Retry operation is enabled when
Pr.67
≠
"0". For
Pr.67
, set the number of retries at activation of the protective function.
• When retries fail consecutively more than the number of times set in
Pr.67
, a retry count excess (E.RET) occurs, resulting
in an inverter retries. (Refer to the retry failure example.)
• Use
Pr.68
to set the waiting time from a protective function activation to a retry in the range of 0.1 to 600 s.
• During retry operation, the during retry (Y64) signal is ON. For the Y64 signal, set "64 (positive logic)” or "164 (negative
logic)" in any of
Pr.190 to Pr.196 (Output terminal function selection)
to assign the function.
Retry count check (Pr.69)
• 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 (3.1 s at the shortest). (When retry is successful, the
cumulative number of retry failures is cleared.)
• Writing "0" in
Pr.69
clears the cumulative count.
This function allows the inverter to reset itself and restart at activation of the protective function (fault indication). The
retry generating protective functions can be also selected.
When the automatic restart after instantaneous power failure function is selected (
Pr.57 Restart coasting time
≠
9999),
the restart operation is also performed after a retry operation as well as after an instantaneous power failure. (Refer to
for the restart operation.)
Pr.
Name
Initial value
Setting range
Description
65
H300
Retry selection
0
0 to 5
A retry-making fault can be selected. (Refer to the table
on
the next page
.)
67
H301
Number of retries at
fault occurrence
0
0
No retry function
1 to 10
Set the number of retries at a fault occurrence.
A fault output is not provided during the retry operation.
101 to 110
Set the number of retries at a fault occurrence. (The setting
value minus 100 is the number of retries.)
A fault output is provided during the retry operation.
68
H302
Retry waiting time
1 s
0.1 to 600 s
Set the waiting time from a fault occurrence to a retry.
69
H303
Retry count display
erase
0
0
Clears the number of successful restarts made by retries.
Pr.67 setting
Fault output during retry operation
Retry count
0
―
No retry function
1 to 10
Not provided
1 to 10 times
101 to 110
Provided
1 to 10 times
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
Pr. 68
× 4
(If it is below 3.1s, 3.1s is set.)
Retry success
Retry success example
Success count + 1
Time
ON
Fault occurrence
Retry success count
Retry start
Содержание 800 Series
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