Operation Setting At Alarm Occurrence; Retry Function (Pr. 65, Pr. 67 To Pr. 69) - Mitsubishi Electric FR-A700 Instruction Manual

Operation setting at alarm occurrence

4.18 Operation setting at alarm occurrence

Purpose
Recover by retry operation at alarm
occurrence
Output alarm code from terminal
Do not output input/output phase
failure alarm
The motor is decelerated to stop at
motor thermal activation

4.18.1 Retry function (Pr. 65, Pr. 67 to Pr. 69)

If an alarm occurs, the inverter resets itself automatically to restart. You can also select the alarm description for
a retry.
When automatic restart after instantaneous power failure is selected (Pr. 57 Restart coasting time ≠ "9999"), restart
operation is performed at retry operation as at an instantaneous power failure. (Refer to page 261 for the restart
function.)
Parameter
Name
Number
65 Retry selection
Number of retries at alarm
67
occurrence
68 Retry waiting time
69 Retry count display erase
Retry success example
Pr.68
Pr.68
Inverter
output
frequency
0
Retry start
Alarm occurrence
Retry success count
Y64 ON
Retry failure example
Pr.68
Inverter
output
frequency
0
First
retry Alarm
Alarm
occurrence occurrence
Alarm signal
(ALM)
ON
Y64
268
Retry operatoin
Alarm code output function
Input/output phase failure
protection selection
Fault definition
Initial
Value
0
0
1s
0
Retry success
5
Time
Success count + 1
Pr.68 Pr.68
Second Third
retry Alarm retry
Retry failure
occurrence (E.RET)
ON
ON ON
Parameter that must be Set
Pr. 65, Pr. 67 to Pr. 69
Setting
Range
An alarm for retry can be selected. (Refer to the next
0 to 5
page)
0 No retry function
Set the number of retries at alarm occurrence.
1 to 10
An alarm output is not provided during retry operation.
Set the number of retries at alarm occurrence. (The
101 to 110 setting value of minus 100 is the number of retries.)
An alarm output is provided during retry operation.
Set the waiting time from when an inverter alarm occurs
0 to 10s
until a retry is made.
0 Clear the number of restarts succeeded by retry.
⋅ Retry operation automatically resets an alarm and
restarts the inverter at the starting frequency when the
time set in Pr. 68 elapses after the inverter stopped due
to the alarm.
⋅ Retry operation is performed by setting Pr. 67 to any
value other than "0". Set the number of retries at alarm
occurrence in Pr. 67.
⋅ When retries fail consecutively more than the number
of times set in Pr. 67 , a retry count excess alarm
(E.RET) occurs, stopping the inverter output.
(Refer to retry failure example)
⋅ Use Pr. 68 to set the waiting time from when an inverter
alarm occurs until a retry is made in the range 0 to 10s.
(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 retry. The
cumulative count in Pr. 69 is increased by 1 when a
retry is regarded as successful after normal operation
continues without alarms occurring for more than four
times longer than the time set in Pr. 68 after a retry start.
⋅ Writing "0" in Pr. 69 clears the cumulative count.
⋅ During a retry, the Y64 signal is on. For the Y64 signal,
Time
assign the function by setting "64 (positive logic)" or
"164 (negative logic)" in any of Pr. 190 to Pr. 196 (output
terminal function selection) .
CAUTION
When terminal assignment is changed using Pr. 190 to Pr.
196, the other functions may be affected. Please make
setting after confirming the function of each terminal.
Pr. 76
Pr. 251, Pr. 872
Pr. 875
Description
Refer to
Page
268
270
271
272