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

Operation setting at alarm occurrence

4.13 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

4.13.1 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 126 for the restart
function.)
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 156)
Retry success example
Pr.68
Pr.68
Inverter
output
frequency
0
Retry start
Alarm occurrence
Retry success count
ON
Y64
Retry failure example
Pr.68
Inverter
output
frequency
0
First
retry Alarm
Alarm
occurrence occurrence
Alarm signal
(ALM)
ON
Y64
132
Retry operatoin
Alarm code output function
Input/output phase failure
protection selection
Initial
Name
Value
0
0
1s
0
Retry success
5
Time
Success count + 1
Pr.68 Pr.68
Second Third
retry Alarm retry
Retry failure
occurrence
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
0 to 10s
occurs 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.
⋅ 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,
assign the function by setting "64 (positive operation)"
Time
or "164 (negative operation)" in any of Pr. 190 to Pr. 196
(output terminal function selection) .
CAUTION
(E.RET)
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
Description
Refer to
Page
132
134
135