Retry Function - Mitsubishi Electric 800 Series Instruction Manual (Function

12.7

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 also be 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. (For restart operation,
refer to page 443 and page 449
Pr. Name
65
Retry selection
H300
67 Number of retries at fault
H301 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.
• The retry function is enabled when the Pr.67 setting is other than "0". Set the number of retries at activation of the protective
function in Pr.67.
Pr.67 setting Fault output during retry operation
0 —
1 to 10 Not available
101 to 110 Available
• 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 parameter from 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 seconds at the shortest). (When retry is successful, the
cumulative number of retry failures is cleared.)
for selection.)
Initial
Setting range
value
0 0 to 5 Faults which trigger the retry operation can be selected.
0 The retry function disabled.
Set the number of retries at a fault occurrence.
1 to 10
A fault output is not provided during the retry operation.
0
Set the number of retries at a fault occurrence. (The setting value minus
101 to 110 100 is the number of retries.)
A fault output is provided during the retry operation.
Set the time delay from when an inverter fault occurs until the retry
1 s 0.1 to 600 s
operation starts.
Setting "0" clears the retry success counter ("retry success" means that
0 0
the inverter successfully restarts).
Retry count
No retry function
1 to 10 times
1 to 10 times
Description
12. (H) Protective Function Parameters
12.7 Retry function
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