Restarting Operation After Transient Fault (Auto Restart Function) - Omron VARISPEED F7 User Manual

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.
• OC (Overcurrent)
• GF (Ground fault)
• PUF (DC bus fuse blown)
• OV (Main circuit overvoltage)
• UV1 (Main Circuit Undervoltage, Main Circuit MC Operation Failure)
• PF (Main circuit voltage fault)
• LF (Output phase failure)
* 1. When L2-01 is set to 1 or 2 (continue operation during momentary power loss).
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-
Related Parameters
Parameter
No.
L5-01 Number of auto restart attempts
L5-02 Auto restart operation selection
Multi-function Digital Outputs (H2-01 to H2-03)
Set Value
1E Automatic restart enabled
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.
•
(multi-function digital output) to 1E (auto restart).
Name
Function
• RH (Braking resistor overheated)
• RR (Braking transistor fault)
• OL1 (Motor overload)
• OL2 (Inverter overload)
* 1
• OH1 (Motor overheat)
• OL3 (Overtorque 1)
• OL4 (Overtorque 2)
Control Methods
Change
Factory during
V/f with
Setting Opera-
V/f
PG
tion
0 No A A
0 No A A
Control Methods
V/f
V/f with
PG
Yes Yes
6
Open Closed
Loop Loop
Vector Vector
A A
A A
Open Closed
Loop Loop
Vector Vector
Yes Yes
61
6-