YASKAWA A1000 Technical Manual page 497

No. (Addr.) Name
L3-27
Stall Prevention Detection Time
(456H)
L3-34
Torque Limit Delay Time
(16FH)
Speed Agree Width at Intelligent
L3-35
Stall Prevention during
(747H)
Deceleration
<8> Parameter value is changed if E2-11 is manually changed or changed by Auto-Tuning.
<9> Default setting is determined by the drive model (o2-04) and duty selection (C6-01).
<10> Default setting is determined by the control mode (A1-02).
<14> Default setting value is dependent on the motor code set to parameter E5-01.
<18> Values shown here are for 200 V class drives. Double the value when using a 400 V class drive.
<33> Default setting value is dependent on the setting for the input voltage (E1-01).
<34> The setting range is 0 to 2 in OLV/PM control mode.
The setting range is 0 and 1 in CLV or AOLV/PM control modes.
<35> The upper limit of the setting range and default setting is determined by the values set to the duty selection (C6-01) and the carrier frequency
reduction selection (L8-38).

L4: Speed Detection
No. (Addr.) Name
L4-01
Speed Agreement Detection Level
(499H)
L4-02
Speed Agreement Detection Width
(49AH)
L4-03 Speed Agreement Detection Level
(49BH) (+/-)
L4-04 Speed Agreement Detection Width
(49CH) (+/-)
L4-05 Frequency Reference Loss
(49DH) Detection Selection
L4-06 Frequency Reference at Reference
(4C2H) Loss
L4-07
Speed Agree Detection Selection
(470H)
<10> Default setting is determined by the control mode (A1-02).
YASKAWA ELECTRIC SIEP C710616 27G YASKAWA AC Drive A1000 Technical Manual
V/f V/f w/PG
OLV/PM AOLV/PM
Sets the time the current must exceed the Stall Prevention level to activate Stall Prevention.
V/f V/f w/PG
OLV/PM AOLV/PM
Sets the filter time constant in seconds for the torque limit value to return to set value when the
Power KEB Ride-Thru is enabled (L2-29 = 1). If oscillation occurs during Power KEB
Ride-Thru, then gradually increase this setting in increments of 0.010 s.
Note: 1. This parameter is not available in models CIMR-A4A0930 and 4A1200.
2. L3-34 is automatically set to 0.2 when A1-02 is set to "6" (AOLV/PM). L3-34 is
automatically set to 0.02 when A1-02 is set to "7" (CLV/PM).
V/f V/f w/PG
OLV/PM AOLV/PM
There is normally no need to change this parameter from the default value.
Sets the width of the speed agreement when L3-04=2 (Intelligent Stall Prevention during
deceleration) in units of 0.01 Hz. Use this parameter when hunting is started by a frequency
reference in analog input.
Note: This parameter is not available with models CIMR-A4A0930 and 4A1200.
All Modes
L4-01 sets the frequency detection level for digital output functions H2- = 2, 3, 4, 5.
L4-02 sets the hysteresis or allowable margin for speed detection.
All Modes
L4-03 sets the frequency detection level for digital output functions H2- = 13, 14, 15, 16.
L4-04 sets the hysteresis or allowable margin for speed detection.
All Modes
0: Operate following the frequency reference
1: Run. Drive continues operation according to the setting of L4-06.
All Modes
Sets the percentage of the frequency reference that the drive should run with when the
frequency reference is lost.
All Modes
0: No detection during baseblock.
1: Detection always enabled.
Description
OLV CLV
CLV/PM
OLV CLV
CLV/PM
OLV CLV
CLV/PM
Description
B.3 Parameter Table
Setting Page
Default: 50 ms
Min: 0 ms 288
Max: 5000 ms
Default: Determined by
A1-02
288
Min: 0.000
Max: 1.000
Default: 0.00 Hz
Min: 0.00 Hz 288
Max: 1.00 Hz
Setting Page

Default:
<10>
Min: 0.0 Hz 288
Max: 400.0 Hz

Default:
<10>
Min: 0.0 Hz 288
Max: 20.0 Hz
Default: 0.0 Hz
Min: -400.0 Hz 289
Max: 400.0 Hz

Default:
<10>
Min: 0.0 Hz 289
Max: 20.0 Hz
Default: 0
Min: 0 289
Max: 1
Default: 80.0%
Min: 0.0% 289
Max: 100.0%
Default: 0
Min: 0 289
Max: 1
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