YASKAWA U1000 Series - L4: Speed Detection

5.8 L: Protection Functions
308 YASKAWA ELECTRIC SIEP C710636 02B YASKAWA U1000 Technical Manual
■ L3-40/L3-45: Current-limited Maximum S-curve Selection during Acceleration/
Deceleration
Enable or disable the maximum S-curve for current-limited acceleration/deceleration (acceleration: L3-40, deceleration:
L3-45).
The acceleration/deceleration rate of the motor when starting and at the start of deceleration is optimized. Because it is
optimized, the actual acceleration/deceleration time may exceed the setting.
Enable this function when an overcurrent (oC) or other error occurs immediately after starting acceleration or
deceleration.
0: Disabled
1: Enabled
◆ L4: Speed Detection
These parameters set up the speed agree and speed detection functions which can be assigned to the multi-function
output terminals.
The speed is detected using the motor speed when A1-02 = 3 or 7.
■
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.
Refer to H2-01 to H2-03: Multi-Function Digital Outputs Function Selection on page 276, Settings 2, 3, 4, and 5.
■
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.
Refer to H2-01 to H2-03: Multi-Function Digital Outputs Function Selection on page 276, Settings 13, 14, 15, and 16.
■
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.
No. Name Setting Range Default
L3-40 Current-limited Maximum S-curve Selection during Acceleration 0, 1 0
L3-45 Current-limited Maximum S-curve Selection during Deceleration 0, 1 0
No. Name Setting Range Default
L4-01
<1> In AOLV/PM and CLV/PM control modes, the setting units and range are expressed as a percent (0.0 to 100.0%) instead of in Hz.
Speed Agreement Detection Level 0.0 to 400.0 Hz <1> 0.0 Hz <1>
L4-02 Speed Agreement Detection Width 0.0 to 20.0 Hz Determined by A1-02
No. Name Setting Range Default
L4-03
<1> In AOLV/PM and CLV/PM control modes, the setting units and range are expressed as a percent (-100.0 to 100.0%) instead of in Hz.
Speed Agreement Detection Level (+/-)
-400.0 to 400.0 Hz
<1> 0.0 Hz <1>
L4-04
Speed Agreement Detection Width (+/-)
0.0 to 20.0 Hz Determined by A1-02
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