Retry Function - Mitsubishi Electric FR-A820-00046 (0.4K) Instruction Manual

NOTE
• When several motors are connected, output phase loss cannot be detected even if the wiring to one motor loses phase.
• If an input phase is lost while Pr.872 = "1" (with input phase loss protection), Pr.261 Power failure stop selection ≠ "0" (power
failure stop function enabled), the motor decelerates to stop without outputting E.ILF.
• In the case of R/L1, S/L2 phase loss, the input phase loss protection does not operate, and the inverter output is shut off.
• If an input phase loss continues for a long time, the lives of converter section and capacitor of the inverter become shorter.
Parameters referred to
Pr.261 Power failure stop selectionpage 610

5.10.8 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 597 and page 604
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.
• Retry operation is performed when Pr.67 ≠ "0". Set the number of retries at activation of the protective function in Pr.67.
Fault output during retry
Pr.67 setting
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 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.)
for selection.)
Initial
Setting range
value
0 0 to 5 A fault for retry can be selected.
0 No retry operation
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.
1 s 0.1 to 600 s Set the waiting time from a fault occurrence to a retry.
0 0 Clear the number of restarts succeeded by retries.
Retry count
No retry function
1 to 10 times
1 to 10 times
Description
5. PARAMETERS
5.10 (H) Protective function parameter
1
2
3
4
5
6
7
8
9
10
405