L4: Speed Detection - YASKAWA T1000A Technical Manual

u L4: Speed Detection
These parameters set up the speed agree and speed detection functions which can be assigned to the multi-function
output terminals.
A speed agree situation can be detected by the motor speed when using Closed Loop Vector Control and Closed Loop
Vector Control for PM motors.
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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.
M5-M6 Function Selection on page
No.
L4-01
L4-02
<1> The setting range depends on the control mode selected for the drive. The setting range is 0.0 to 100.0% in AOLV/PM and CLV/PM.
<2> The setting range depends on the control mode selected for the drive. The setting range is 0.0 to 40.0% in AOLV/PM and CLV/PM.
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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.
M5-M6 Function Selection on page
No.
L4-03
L4-04
<1> The setting range depends on the control mode selected for the drive. The setting range is –100.0 to 100.0% in AOLV/PM and CLV/PM.
<2> The setting range depends on the control mode selected for the drive. The setting range is 0.0 to 40.0% in AOLV/PM and CLV/PM.
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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 before or below 5% of the maximum output
frequency within 400 ms.
Figure 5.85
To have a digital output trigger when frequency reference loss occurs, set H2-01, H2-02, or H2-03 to C.
C: Frequency reference loss on page 194
Parameter L4-05 selects the operation when a frequency reference loss is detected.
No.
L4-05
Setting 0: Stop
Drive follows the frequency reference (which is no longer present) and simply stops the motor.
YASKAWA ELECTRIC SIEP C710616 30B YASKAWA AC Drive T1000A Technical Manual
190, Settings 2, 3, 4, and 5.
Name
Speed Agreement Detection Level
Speed Agreement Detection Width
190, Settings 13, 14, 15, and 16.
Name
Speed Agreement Detection Level (+/-)
Speed Agreement Detection Width (+/-)
Analog
frequency
reference
400 ms
Loss of
Reference
OFF
output
Figure 5.85 Loss of Reference Function
for details on setting the output function.
Name
Frequency Reference Loss Detection Selection
Refer to H2-01 to H2-03: Terminal M1-M2, M3-M4, and
Setting Range
0.0 to 400.0 Hz
0.0 to 20.0 Hz
Refer to H2-01 to H2-03: Terminal M1-M2, M3-M4, and
Setting Range
–400.0 to 400.0 Hz
0.0 to 20.0 Hz
100%
10%
ON
time
Setting Range
5.8 L: Protection Functions
Default
Determined by A1-02
<1>
Determined by A1-02
<2>
Default
0.0 Hz
<1>
Determined by
<2>
Refer to Setting
Default
0 or 1 0
<1>
<2>
A1-02
5
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