Restarting Operation After Transient Error (Auto Restart Function) - Omron VARISPEED G7 Instruction Manual

Restarting Operation After Transient Error (Auto Restart Function)

If an Inverter error occurs during operation, the Inverter will perform self-diagnosis. If no error is detected, the
Inverter will automatically restart. This is called the auto restart function.
Set the number of auto restarts in constant 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.
• OC (Overcurrent)
• GF (Ground fault)
• PUF (Fuse blown)
• OV (Main circuit overvoltage)
• UV1 (Main Circuit Undervoltage, Main Circuit MC Operation Failure)
• PF (Main circuit voltage fault)
• LF (Output phase failure)
* 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 Constants
Name
Con-
stant
Display
Number
Number of
Sets the number of auto restart
auto restart
attempts.
attempts
L5-01 Automatically restarts after a fault
and conducts a speed search from
Num of
the run frequency.
Restarts
Auto restart Sets whether a fault contact output
operation is activated during fault restart.
selection 0: Not output (Fault contact is not
L5-02
activated.)
1: Output (Fault contact is
Restart Sel
activated.)
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.
•
Setting
Description
Range
0 to 10
0 or 1
Continuing Operation
• RH (Braking resistor overheated)
• RR (Braking transistor error)
• OL1 (Motor overload)
• OL2 (Inverter overload)
• OH1 (Motor overheat)
*
• OL3 (Overtorque)
• OL4 (Overtorque)
Control Methods
Change
Factory during
V/f
Setting Opera-
V/f with
tion
PG
0 No A A
0 No A A
Open Open
Flux
Loop Loop
Vec-
Vector Vector
tor
1 2
A A A
A A A
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