Continuing Operation At Constant Speed When Frequency Reference Is Lost - YASKAWA CIMR-G7U Technical Manual


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
Name
Parameter
Number
Display
Frequency
Reference
Loss
Detection
Selection
L4-05
Ref Loss Sel
Description
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.
Change
Setting Factory
during
Range Setting
V/f
Operation
0 to 1 0 No A
Continuing Operation
Control Methods
Open Open
V/f
Loop Flux Loop
with
Vector Vector Vector
PG
1 2
A A A A
65
6-