5-18
·These parameter settings are effective for smoothoperation of the Inverter if the ana-
log input signal changes too rapidly or the signal is interfered with by noise.
·The larger the set value is, the slower the response will be.
n070 Multi-function Analog Voltage
Input Filter Time Constant
Register 0146
Hex
Changes during
operation
Yes
Setting
range
0.00 to 2.00 (s) Unit of
setting
0.01 s Default setting 0.10
n073 Multi-function Analog Current
Input Filter Time Constant
Register 0149
Hex
Changes during
operation
Yes
Setting
range
0.00 to 2.00 (s) Unit of
setting
0.01 s Default setting 0.10
H Frequency Reference Loss Detection (n064)
This function is provided for 5.5- and 7.5-kW Inverters only. If the frequency reference
from the control circuit drops by more than 90% within 400 ms, this function detects it
anddeterminesthatthereferencehasbeenlost(e.g.,fromsomecausesuchasdiscon-
nected wiring).
· Whenoperatinginremotemode,thesettingforthefrequencyreferencelossdetection
function is enabled when either an analog reference or a pulse train reference is se-
lected for n004 (frequency reference selection).
Note 1. If “frequencereference agree” (setvalue: 2)is presetfor multi-function outputs1 to 3
(n057ton059),thefrequencyreferencelossstatuscanbechecked.Whenusingthis
output, implement external error processing.
Note 2. When the frequency reference loss detection is enabled and a loss is detected, op-
eration will continue at 80% of the frequency reference prior to the loss.
Note 3. If the frequency reference isrestored during a frequencyreference loss, and the fre-
quency returned to at least the level of the continuing operation, the frequency refer-
ence loss detection will be cleared and the Inverter will return to normal operation.
Note 4. Frequencyreferencelossdetectiondoesnotoperateformulti-functionanaloginputs.
n064 Frequency Reference Loss
Detection
Register Changes during
operation
0140
Hex
No
Setting
range
0, 1 Unit of
setting
1
Default
setting
0
Value Description
0 Loss detection disabled. (Operation according to frequency reference;
frequency reference loss detection disabled.)
1 Loss detection enabled. (After loss detection, operation continues at 80% of
the frequency reference prior to the loss; frequency reference loss detection
enabled.)
Basic Operation Chapter 5
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