No. Name Setting Range Default
L4-01 Speed Agreement Detection Level 0.0 to 400.0 Hz 0.0 Hz
L4-02 Speed Agreement Detection Width 0.0 to 20.0 Hz 2.0 Hz
Refer to H2-01 to H2-03: Terminal MA/MB/MC, P1/PC, and P2/PC Function Selection on page 174, Settings 2, 3, 4, and
5.
n
L4-03/04: Speed Agreement 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 Agreement Detection Level (+/-) 0.0 to 400.0 Hz 0.0 Hz
L4-04 Speed Agreement Detection Width (+/-) 0.0 to 20.0 Hz 2.0 Hz
Refer to H2-01 to H2-03: Terminal MA/MB/MC, P1/PC, and P2/PC Function Selection on page 174, 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 or A2. Reference loss is detected when the frequency
reference value reduces for 90% within 400 ms.
100%
400ms
Analog
frequency
reference
Loss of
Reference
output
time
80%
10%
ON
OFF
Figure 5.75 Loss of Reference Function
To have a fault output trigger when frequency reference loss occurs, set H2-01, H2-02, or H2-03 to “C”.
Refer to Setting C:
Frequency Reference Loss on page 177 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 or 1 0
Setting 0: Stop
The drive will stop the motor.
Setting 1: Continue Operation with Reduced Frequency Reference
The drive will continue operation at the frequency reference value set in 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 the drive runs with when L4-05 = 1 and a reference loss was detected. 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 Agreement Detection Selection
Determines when frequency detection is active using parameters L4-01 through L4-04.
No. Name Setting Range Default
L4-07 Speed Agreement Detection Selection 0, 1 0
5.8 L: Protection Functions
YASKAWA TOEP YAIQPM 03B YASKAWA AC Drive - iQpump Micro User Manual
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5
Parameter Details
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