Omron SYSDRIVE 3G3MV User Manual page 117

Basic Operation
·These parameter settings are effective for smooth operation 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
Setting 0.00 to 2.00 (s)
range
Multi-function Analog Current
n073
Input Filter Time Constant
Setting 0.00 to 2.00 (s)
range
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
and determines that the reference has been lost (e.g., from some cause such as discon-
nected wiring).
When operating in remote mode, the setting for the frequency reference loss detection
·
function is enabled when either an analog reference or a pulse train reference is se-
lected for n004 (frequency reference selection).
If "frequence reference agree" (set value: 2) is preset for multi-function outputs 1 to 3
Note 1.
(n057 to n059), the frequency reference loss status can be checked. When using this
output, implement external error processing.
When the frequency reference loss detection is enabled and a loss is detected, op-
Note 2.
eration will continue at 80% of the frequency reference prior to the loss.
If the frequency reference is restored during a frequency reference loss, and the fre-
Note 3.
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
Frequency reference loss detection does not operate for multi-function analog inputs.
Note 4.
Frequency Reference Loss
n064
Detection
Setting 0, 1
range
Value
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.)
5-18
Register 0146
Hex
Unit of 0.01 s Default setting
setting
Register 0149
Hex
Unit of 0.01 s Default setting
setting
Register Changes during
operation
Unit of 1
setting
Description
Chapter 5
Changes during
operation
Changes during
operation
0140
Hex
Default
setting
Yes
0.10
Yes
0.10
.
No
0