6-66
Restarting Operation After Transient Error (Auto Restart Function)
If a Drive error occurs during operation, the Drive will perform self-diagnosis. If no error is detected, the
Drive will automatically restart. This is called the auto restart function.
Set the number of auto restarts in parameter L5-01.
The auto restart function can be applied to the following errors. If an error not listed below occurs, the protec-
tion function will operate and the auto restart function will not.
* When L2-01 is set to 1 or 2 (continue operation during momentary power loss)
Auto Restart External Outputs
To output auto restart signals externally, set H2-01 to H2-05 (multi-function contact output terminals M1-M2,
M3-M4, M5-M6, P3-C3, and P4-C4 function selection) to 1E (auto restart).
Related Parameters
Application Precautions
• The number of auto restarts count is reset under the following conditions:
After auto restart, normal operation has continued for 10 minutes.
After the protection operation has been performed, and the error has been verified, and an fault reset
has been input.
After the power supply is turned OFF, and then ON again.
• Do not use the auto restart function with variable loads.
• OC (Overcurrent) • RH (Braking resistor overheated)
• GF (Ground fault) • RR (Braking transistor error)
• PUF (Fuse blown) • OL1 (Motor overload)
• OV (Main circuit overvoltage) • OL2 (Drive overload)
• UV1 (Main Circuit Undervoltage, Main Circuit MC Operation Failure)
*
• OH1 (Motor overheat)
• PF (Main circuit voltage fault) • OL3 (Overtorque)
• LF (Output phase failure) • OL4 (Overtorque)
Parameter
Number
Name
Description
Setting
Range
Factory
Setting
Change
during
Operation
Control Methods
Display
V/f
V/f
with
PG
Open
Loop
Vector
1
Flux
Vector
Open
Loop
Vector
2
L5-01
Number of
Auto Restart
Attempts
Sets the counter for the number of
times the Drive will perform an
automatic restart on the following
faults: GF, LF, OC, OV, PF, PUF,
RH, RR, OL1, OL2, OL3, OL4,
UV1. Auto restart will check to see
if the fault has cleared every 5ms.
When no fault is present, the Drive
will attempt an auto restart. If the
Drive faults after an auto restart
attempt, the counter is incremented.
When the Drive operates without
fault for 10 minutes, the counter
will reset to the value set in L5-01.
0 to 10 0 No A A A A A
Num of
Restarts
L5-02
Auto Restart
Operation
Selection
Determines if the fault contact
activates during an automatic
restart attempt.
0: No Fault Relay - fault contact
will not activate during an
automatic restart attempt.
1: Fault Relay Active - fault
contact will activate during an
automatic restart attempt.
0 to 1 0 NoAAAAA
Restart Sel
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