No.
Name
Setting Range
Default
L4-01
Speed Agree Detection Level
0.0 to 400.0 Hz
0.0 Hz
L4-02
Speed Agree Detection Width
0.0 to 20.0 Hz
Determined by
A1-02
Refer to H2-01 to H2-03: Terminal M1-M2, M3-M4, and M5-M6 Function Selection on page 287
n
L4-03, L4-04: Speed Agree Detection Level and Detection Width (+/-)
Parameter L4-03 sets the detection level for the digital output functions Speed agree 2, User-set speed agree 2, Frequency
detection 3, and Frequency detection 4.
Parameter L4-04 sets the hysteresis level for these functions.
No.
Name
Setting Range
Default
L4-03
Speed Agree Detection Level (+/-)
-400.0 to 400.0 Hz
0.0 Hz
L4-04
Speed Agree Detection Width (+/-)
0.0 to 20.0 Hz
Determined by
A1-02
Refer to H2-01 to H2-03: Terminal M1-M2, M3-M4, and M5-M6 Function Selection on page 287
, Settings 13, 14, 15, and
16.
n
L4-05: Frequency Reference Loss Detection Selection
The drive can detect a loss of an analog frequency reference from input A1, A2, or A3. Frequency reference loss is detected
when the frequency reference drops below 10% of the reference or below 5% of the maximum output frequency within 400
ms. Restoring the analog frequency reference to the L4-06 value or higher before loss occurs will clear the frequency reference
loss status.
Loss of
Reference
output
100%
L4-06 (%)
time
10%
Analog
frequency
reference
400 ms
ON
OFF
Ratio of analog
frequency reference
before loss
Figure 5.97 Loss of Reference Function
Set H2-01, H2-02, or H2-03 to C for a digital output to trigger when frequency reference loss occurs.
Frequency Reference Loss on page 292
for details on setting the output function.
Parameter L4-05 selects the operation when a frequency reference loss is detected.
No.
Name
Setting Range
Default
L4-05
Frequency Reference Loss Detection Selection
0, 1
0
Setting 0: Operate following the frequency reference
Setting 1: Continue operation with reduced frequency reference
The drive will continue operation at the frequency reference value set to parameter L4-06. When the external frequency
reference value is restored, the operation is continued with the frequency reference.
n
L4-06: Frequency Reference at Reference Loss
Sets the frequency reference level at which the drive runs when L4-05 = 1 and when detecting a reference loss. The value is
set as a percentage of the frequency reference before the loss was detected.
No.
Name
Setting Range
Default
L4-06
Frequency Reference at Reference Loss
0.0 to 100.0%
80.0%
n
L4-07: Speed Agree Detection Selection
Determines when frequency detection is active using parameters L4-01 through L4-04.
5.8 L: Protection Functions
YASKAWA ELECTRIC SIEP C710636 04D U1000 Industrial MATRIX Drive Technical Manual
321
5
Parameter Details
Summary of Contents for U1000 iQpump Drive
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