Mitsubishi Electric F700 User Manual

132
Operation setting at alarm occurrence
4.13 Operation setting at alarm occurrence
4.13.1 Retry function (Pr. 65, Pr. 67 to Pr. 69)
⋅ 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)"
or "164 (negative operation)" in any of Pr. 190 to Pr. 196
(output terminal function selection) .
Purpose Parameter that must be Set
Refer to
Page
Recover by retry operation at alarm
occurrence
Retry operatoin Pr. 65, Pr. 67 to Pr. 69 132
Output alarm code from terminal Alarm code output function Pr. 76 134
Do not input/output phase failure
alarm
Input/output phase failure
protection selection
Pr. 251, Pr. 872 135
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
Name
Initial
Value
Setting
Range
Description
65 Retry selection 0 0 to 5
An alarm for retry can be selected. (Refer to the next
page)
67
Number of retries at alarm
occurrence
0
0 No retry function
1 to 10
Set the number of retries at alarm occurrence.
An alarm output is not provided during retry
operation.
101 to 110
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.
68 Retry waiting time 1s 0 to 10s
Set the waiting time from when an inverter alarm
occurs until a retry is made.
69 Retry count display erase 0 0 Clear the number of restarts succeeded by retry.
The above parameters can be set when Pr. 160 User group read selection = "0". (Refer to page 156)
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.
Retry failure example
Inverter
output
frequency
Alarm
occurrence
First
retry
Alarm
occurrence
Second
retry
Alarm
occurrence
Third
retry
Retry failure
(E.RET)
ON
0
Alarm signal
(ALM)
Pr.68
Pr.68 Pr.68
Time
Y64
ON ON ON
Inverter
output
frequency
0
Y64
Pr.68
Pr.68 5
Retry success
Retry success example
Success count + 1
Time
ON
Alarm occurrence
Retry success count
Retry start

Mitsubishi Electric F700 Specifications

General

Brand	Mitsubishi Electric
Model	F700
Category	Inverter
Language	English