Omron SYSDRIVE 3G3RV, User Manual

Page: 274 / 446

6
-58
K K K K
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).
n
Related Parameters
* For
(-E) models only. Otherwise always 80.0%.
K
K K
K
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.
* When
L2-01 is set to 1 or 2 (continue operation during momentary power loss)
Param-
eter
Num-
ber
Name
Description
Setting
Range
Factory
Setting
Change
during
Opera-
tion
Control Methods
V/f
V/f
with
PG
Open
Loop
Vec-
tor
LCD Display
L4-05
Operation
when frequency
reference
is missing
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.
0
or 1
0 No A A A
Ref
Loss Sel
L4-06
Frequency
reference for
loss
of frequency reference
Enables
operation selection when frequency ref-
erence
is lost and operation at the following
speed:
(Speed
prior to loss) x L4-06
0.0
to
100.0%
80.0 No
A
*
A
*
A
*
Fref
at Floss
• OC
(Overcurrent)
• RH
(Braking resistor overheated)
• GF
(Ground fault)
• RR
(Braking transistor fault)
• PUF
(Fuse blown)
• OL1
(Motor overload)
• OV
(Main circuit overvoltage)
• OL2
(Inverter 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)