Alarm Function - Mitsubishi Electric FR-A700 Technical Manual

2.17 Alarm function

2.17.1 Retry function [Pr. 65, 67 to 69]
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
instantaneous power failure ([Pr. 57 Restart coasting time ≠
[Pr. ] Name
65 Retry selection
Number of retries at fault
67
occurrence
68 Retry waiting time
69 Retry count display erase
(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
360s in , and 0.1 to 600s in
E700
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)
automatic restart after
Initial
Setting Range
Value
0
0
101 to 110
A700 F700
1s
E700
D700
0 0
, 0.1 to
A700 F700
. (When the
D700
common
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.)
A fault for retry can be selected. (Refer to the next
0 to 5
page)
0 No retry function
Set the number of retries at fault occurrence.
1 to 10
A fault output is not provided during retry operation.
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.
0 to 10s
Set the waiting time from when an inverter trips until
0.1 to 360s
a retry is made.
0.1 to 600s
Clear the number of restarts succeeded by retry.
Retry success example
[Pr.68]
Inverter
output
frequency
0
Retry start
Fault occurrence
Retry success count
ON
Y64
Retry failure example
[Pr.68]
Inverter
output
frequency
0
Fault
occurrence
Fault signal
(ALM)
ON
Y64
376
PARAMETER
Description
Retry success
[Pr.68 ] 5
Success count + 1
[Pr.68] [Pr.68]
First Second Third
retry Fault retry Fault retry
occurrence occurrence
ON ON
Time
Time
Retry failure
(E.RET)
ON