Operation Setting At Alarm Occurrence; Retry Function (Pr. 65, Pr. 67 To Pr.69) - Mitsubishi Electric F700 Instruction Manual

Operation setting at alarm occurrence

3.12 Operation setting at alarm occurrence

Purpose
Recover by retry operation at alarm
occurrence
Output alarm code from terminal
Do not input/output phase failure
alarm

3.12.1 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
Pr.60
for a retry.
page 118
When automatic restart after instantaneous power failure is selected (Pr. 57 Restart coasting time ≠ "9999"),
Pr.66
restart operation is performed at retry operation as at an instantaneous power failure. (Refer to page 109 for
page 56
the restart function.)
Pr. 71
page 80
Parameter
Number
65 Retry selection
Number of retries at alarm
67
occurrence
68 Retry waiting time
69 Retry count display erase
The above parameters can be set when Pr. 160 User group read selection= "0". (Refer to page 140)
Retry success example
Pr.68
Inverter
output
frequency
0
retry start
Alarm occurrence
Retry success count
Y64 ON
Retry failure example
Pr.68
Inverter
output
frequency
0
Alarm
occurrence
Alarm signal
(ALM)
ON
Y64
114
Retry operatoin
Alarm code output function
Input/output phase failure
protection selection
Name Initial Value
Retry success
Pr.68 5
Success count + 1
Pr.68 Pr.68
First Second Third
retry Alarm retry Alarm retry
occurrence occurrence
ON ON
Parameter that must be set
Setting
Range
0 0 to 5
0
1 to 10
0
101 to 110
1s 0 to 10s
0 0
⋅ 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 to Pr. 67 , a retry count excess
Time
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.
⋅ 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" to 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
Time
operation)" or "164 (negative operation)" to any of
Pr. 190 to Pr. 196 (output terminal fnction selection) .
Retry failure
CAUTION
(E.RET)
When terminal assignment is changed using Pr. 190 to Pr.
ON
196, the other functions may be affected. Please make
setting after confirming the function of each terminal.
Pr.65, Pr.67 to Pr.69
Pr.76
Pr.251, Pr.872
Description
An alarm for retry can be selected. (Refer to the
next page)
No retry function
Set the number of retries at alarm occurrence.
An alarm output is not provided during retry
operation.
Set the number of retries at alarm occurrence.
(The 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 until a retry is made.
Clear the number of restarts succeeded by retry.
Refer to
Page
114
116
117