Omron VARISPEED F7

6-61
6
 Restarting Operation After Transient Fault (Auto Restart Function)
If an Inverter fault occurs during operation, the Inverter will perform self-diagnosis. If no fault is detected, the
Inverter will restart automatically. This is called the auto restart function.
Set the number of allowed auto restarts in parameter L5-01.
The auto restart function can be applied to the following faults.
If a fault that is not listed above occurs, the protection function will operate and the auto restart function will
not work.
Auto Restart External Outputs
To output auto restart signals externally, set H2- (multi-function digital output) to 1E (auto restart).
Related Parameters
Multi-function Digital Outputs (H2-01 to H2-03)
 Application Precautions
The number of auto restarts counter is reset under the following conditions:
• After auto restart, normal operation has continued for 10 minutes.
• After the protection operation has been performed and an fault reset has been input.
• After the power supply voltage has been cycled.
• OC (Overcurrent) • RH (Braking resistor overheated)
• GF (Ground fault) • RR (Braking transistor fault)
• PUF (DC bus fuse blown) • OL1 (Motor overload)
• OV (Main circuit overvoltage) • OL2 (Inverter overload)
• UV1 (Main Circuit Undervoltage, Main Circuit MC Operation Failure)
* 1
* 1. When L2-01 is set to 1 or 2 (continue operation during momentary power loss).
• OH1 (Motor overheat)
• PF (Main circuit voltage fault) • OL3 (Overtorque 1)
• LF (Output phase failure) • OL4 (Overtorque 2)
Parameter
No.
Name
Factory
Setting
Change
during
Opera-
tion
Control Methods
V/f
V/f with
PG
Open
Loop
Vector
Closed
Loop
Vector
L5-01Number of auto restart attempts 0 No AAAA
L5-02Auto restart operation selection 0 No AAAA
Set Value Function
Control Methods
V/f
V/f
with
PG
Open
Loop
Vector
Closed
Loop
Vector
1E Automatic restart enabled Yes Yes Yes Yes