Yaskawa Matrix Converter - Manual (Page 229)

6
-64
• Power Loss Time Longer than Minimum Baseblock Time
Fig 6.48 Speed Search After Baseblock (Current Detection: Loss Time > L2-03)
‹ Continue Running after Frequency Reference Loss
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 H2-05 (Terminals M1-
M2, P1-PC, P2-PC, P3-C3, and P4-C4 Function Selection) to C (frequency reference lost).
„ Related Parameters
Parameter
Number
Name
Description
Setting
Range
Default
Change
during
Run
Control Methods
Display V/f
Open
Loop
Vector
Flux
Vector
L4-05
Frequency Refer-
ence Loss Detec-
tion Selection 0: Stop (Operation follows the frequency ref-
erence.)
1: Operation at 80% speed continues. (At
80% of speed before the frequency refer-
ence was lost)
Frequency reference is lost: Frequency refer-
ence dropped over 90% in 400 ms.
0 or 1 0 No A A A
Ref Loss Sel
AC power supply
Output frequency
Output current
off on Output frequency before power loss
Set frequency
reference
Minimum Baseblock Time
(L2-03)
Deceleration speed set in b3-03
b3-02
Speed Search Deactivation Current
Speed search Delay time (b3-05)