L4: Speed Detection - YASKAWA P1000 Technical Manual

u

L4: Speed Detection

These parameters set up the speed agree and speed detection functions that can be assigned to the multi-function output
terminals.
n L4-01, L4-02: Speed Agreement Detection Level and Detection Width
Parameter L4-01 sets the detection level for the digital output functions Speed agree 1, User-set speed agree 1, Frequency
detection 1, and Frequency detection 2.
Parameter L4-02 sets the hysteresis level for these functions.
No.
L4-01
L4-02
Refer to H2-01 to H2-03: Terminal M1-M2, M3-M4, and MD-ME-MF Function Selection on page
and 5.
n L4-03, L4-04: 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.
L4-03
L4-04
Refer to H2-01 to H2-03: Terminal M1-M2, M3-M4, and MD-ME-MF Function Selection on page
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.
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 219
Parameter L4-05 selects the operation when a frequency reference loss is detected.
No.
L4-05 Frequency Reference Loss Detection Selection
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.
YASKAWA SIEP YAIP1U 01C AC Drive - P1000 Technical Manual
Name
Speed Agreement Detection Level
Speed Agreement Detection Width
Name
Speed Agreement Detection Level (+/-)
Speed Agreement Detection Width (+/-)
Analog
frequency
reference
400 ms
Loss of
OFF
Reference
output
Figure 5.80 Loss of Reference Function
for details on setting the output function.
Name
Setting Range
0.0 to 400.0 Hz
0.0 to 20.0 Hz
Setting Range
-400.0 to 400.0 Hz
0.0 to 20.0 Hz
Ratio of analog
frequency reference
before loss
100%
L4-06 (%)
10%
ON
time
Setting Range
5.8 L: Protection Functions
Default
0.0 Hz
2.0 Hz
215, Settings 2, 3, 4,
Default
0.0 Hz
2.0 Hz
215, Settings 13, 14,
Refer to Setting C:
Default
0, 1 0
5
253