Retry Function - Mitsubishi Electric 800 Series Instruction Manual

5.10.7

Retry function

This function allows the inverter to reset itself and restart at activation of the protective function (fault indication). The
retry generating protective functions can be also selected.
When the automatic restart after instantaneous power failure function is selected (Pr.57 Restart coasting time ≠ 9999),
the restart operation is also performed after a retry operation as well as after an instantaneous power failure. (Refer to
page 515 for the restart operation.)
Pr. Name
65
Retry selection
H300
67 Number of retries at
H301 fault occurrence
68
Retry waiting time
H302
69 Retry count display
H303 erase
Setting the retry function (Pr.67, Pr.68)
• When the inverter protective function is operating (fault indication), the retry function automatically cancels (resets) the
protective function after the time set in Pr.68. The retry function then restarts the operation from the starting frequency.
• Retry operation is enabled when Pr.67 ≠ "0". For Pr.67, set the number of retries at activation of the protective function.
Pr.67 setting Fault output during retry operation
0 ―
1 to 10 Not provided
101 to 110 Provided
• When retries fail consecutively more than the number of times set in Pr.67, a retry count excess (E.RET) occurs, resulting
in an inverter retries. (Refer to the retry failure example.)
• Use Pr.68 to set the waiting time from a protective function activation to a retry in the range of 0.1 to 600 s.
• During retry operation, the during retry (Y64) signal is ON. For the Y64 signal, set "64 (positive logic)" or "164 (negative
logic)" in any of Pr.190 to Pr.196 (Output terminal function selection) to assign the function.
Retry count check (Pr.69)
• Reading the Pr.69 value provides the cumulative number of successful restart times made by retries. The cumulative count
in Pr.69 increases by 1 when a retry is successful. Retry is regarded as successful when normal operation continues
without a fault for the Pr.68 setting multiplied by four or longer (3.1 s at the shortest). (When retry is successful, the
cumulative number of retry failures is cleared.)
• Writing "0" in Pr.69 clears the cumulative count.
Pr. 68 × 4
Pr.68 (If it is below 3.1s, 3.1s is set.)
Inverter
output
frequency
0
Retry start
Fault occurrence
Retry success count
ON
Y64
Retry success example
Initial value Setting range
0 0 to 5
0
1 to 10
0
101 to 110
1 s 0.1 to 600 s
0 0
Retry success
Inverter
output
frequency
Time
Success count + 1
Fault signal
(ALM)
Y64
(H) Protective function parameter
Description
A retry-making fault can be selected. (Refer to the table on
the next page.)
No retry function
Set the number of retries at a fault occurrence.
A fault output is not provided during the retry operation.
Set the number of retries at a fault occurrence. (The setting
value minus 100 is the number of retries.)
A fault output is provided during the retry operation.
Set the waiting time from a fault occurrence to a retry.
Clears the number of successful restarts made by retries.
Retry count
No retry function
1 to 10 times
1 to 10 times
Pr.68 Pr.68
0
First Second
retry retry
Fault Fault Fault
occurrence occurrence occurrence
ON ON
Retry failure example
Pr.68
Time
Third
retry
Retry failure
(E.RET)
ON
ON
327
PARAMETERS
5
GROUP
H