Continuing Operation At Constant Speed When Frequency Reference Is Lost; Restarting Operation After Transient Fault (Auto Restart Function) - Omron SYSDRIVE 3G3RV Series User Manual

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Continuing Operation at Constant Speed When Frequency Reference Is
Lost
The frequency reference loss detection function continues operation using 80% speed of the frequency refer-
ence before loss when the frequency reference using an analog input is reduced 90% or more in 400 ms.
When the error signal during frequency reference loss is output externally, set H2-01 to H2-03 (multi-function
contact output terminal M1-M2, P1-PC/M3-M4, and P2-PC/M5-M6 function selection) to C (frequency refer-
ence lost).
nRelated Parameters
Param-
eter
Num-
ber
Operation when frequency
reference is missing
L4-05
Ref Loss Sel
Frequency reference for
loss of frequency reference
L4-06
Fref at Floss
* For (-E) models only. Otherwise always 80.0%.
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Restarting Operation After Transient Fault (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 parameter L5-01.
The auto restart function can be applied to the following faults. If an fault 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)
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6
Name
LCD Display
0: Stopped (Operation follows frequency refer-
ence.)
1: Operation at 80% speed continues (At 80% of
speed before the frequency reference was
lost.)
Frequency reference is lost: Frequency reference
dropped over 90% in 400 ms.
Enables operation selection when frequency ref-
erence is lost and operation at the following
speed:
(Speed prior to loss) x L4-06
Setting
Description
Range
0 or 1
0.0 to
100.0%
*
Control Methods
Change
Factory during
Setting Opera-
V/f
tion
0 No A
*
80.0 No
A
• RH (Braking resistor overheated)
• RR (Braking transistor fault)
• OL1 (Motor overload)
• OL2 (Inverter overload)
• OH1 (Motor overheat)
• OL3 (Overtorque)
• OL4 (Overtorque)
Open
V/f
Loop
with
Vec-
PG
tor
A A
* *
A A