YASKAWA G7 Series - Continuing Operation at Constant Speed When Frequency Reference Is Lost

Continuing Operation
6-65
 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 400ms.
When the error signal during frequency reference loss is output externally, set H2-01 to H2-05 (multi-function
contact output terminal M1-M2, M3-M4, M5-M6, P3-C3, and P4-C4 function selection) to C (frequency ref-
erence lost).
Related Parameters
Parameter
Number
Name
Description
Setting
Range
Factory
Setting
Change
during
Operation
Control Methods
Display
V/f
V/f
with
PG
Open
Loop
Vector
1
Flux
Vector
Open
Loop
Vector
2
L4-05
Frequency
Reference
Loss
Detection
Selection
Determines how the Drive will react
when the frequency reference is
lost. The frequency reference is
considered lost when reference
drops 90% or more of its current
value for 400ms.
0: Stop - Drive will stop.
1: Run at L4-06 PrevRef - Drive
will run at the percentage set in
L4-06 of the frequency reference
level at the time frequency
reference was lost.
0 to 1 0 NoAAAAA
Ref Loss Sel
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