L3: stall prevention, L4: speed detection – Yaskawa Z1000U HVAC Matrix Bypass User Manual
Page 331
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L3: Stall Prevention
No.
(Addr.
Hex)
Name
LCD Display
Description
Values
Page
L3-01
(048F)
Stall Prevention
Selection during
Acceleration
StallP Accel Sel
0: Disabled
1: General purpose
2: Intelligent
3: iLim Mode
0: Disabled.
1: General purpose. Acceleration is paused as long as the
current is above the L3-02 setting.
2: Intelligent. Accelerate in the shortest possible time without
exceeding the L3-02 level.
3: Enabled (Current Limit). The acceleration rate is
automatically adjusted while limiting the output current at the
setting value of the stall prevention level (L3-02).
Default: 1
Range: 0 to 3
–
L3-02
(0490)
Stall Prevention Level
during Acceleration
StallP Accel Lvl
Used when L3-01 = 1 or 2. 100% is equal to the drive rated
current.
Default:
<1>
Min.: 0%
Max.: 150%
<1>
L3-03
(0491)
Stall Prevention Limit
during Acceleration
StallPAccDecLim
Sets Stall Prevention lower limit during acceleration when
operating in the constant power range. Set as a percentage of
drive rated current.
Default: 50%
Min.: 0
Max.: 100
L3-04
(0492)
Stall Prevention
Selection during
Deceleration
StallP Decel Sel
0: Disabled
1: General Purpose
4: High Flux Brake
6: ILim Mode
0: Disabled. Deceleration at the active deceleration rate. An ov
fault may occur.
1: General purpose. Deceleration is paused when the DC bus
voltage exceeds the Stall Prevention level.
4: Overexcitation Deceleration. Decelerates while increasing
the motor flux
6: Enable (Current Limit). The deceleration rate is
automatically adjusted while limiting the regeneration current
at the setting value of the stall prevention level (L3-14).
Default: 1
Range: 0, 1, 4, 6
L3-05
(0493)
Stall Prevention
Selection during Run
StallP Run Sel
0: Disabled
1: Decel time
2: Decel time 2
0: Disabled. Drive runs at a set frequency. A heavy load may
cause speed loss.
1: Decel time 1. Uses the deceleration time set to C1-02 while
Stall Prevention is performed.
2: Decel time 2. Uses the deceleration time set to C1-04 while
Stall Prevention is performed.
Default: 1
Range: 0 to 2
–
L3-06
(0494)
Stall Prevention Level
during Run
StallP Run Level
Enabled when L3-05 is set to 1 or 2. 100% is equal to the drive
rated current.
Default:
<1>
Min.: 30%
Max.: 150%
<1>
L3-14
(04C7)
Stall Prevention Level
during Deceleration
StallP Decel Lvl
Used when L3-04 = 1. 100% is equal to the drive rated current.
Default: 120%
Min.: 80
Max.: 120
<1>
–
L3-23
(04FD)
Automatic Reduction
Selection for Stall
Prevention during Run
CHP Stall P Sel
0: Lv1 set in L3-06
1: Autom. Reduction
0: Sets the Stall Prevention level set in L3-04 that is used
throughout the entire frequency range.
1: Automatic Stall Prevention level reduction in the constant
output range. The lower limit value is 40% of L3-06.
Default: 0
Range: 0, 1
–
<1> Upper limit and default values are dependent on parameter L8-38, Frequency Reduction Selection.
u
L4: Speed Detection
No.
(Addr.
Hex)
Name
LCD Display
Description
Values
Page
L4-01
(0499)
Speed Agreement
Detection Level
Spd Agree Level
Sets the frequency detection level for digital output functions
H2-oo = 2, 3, 4, 5.
Default: 0.0 Hz
Min.: 0.0
Max.: 400.0
L4-02
(049A)
Speed Agreement
Detection Width
Spd Agree Width
Sets the hysteresis or allowable margin for speed detection.
Default: 2.0 Hz
Min.: 0.0
Max.: 20.0
L4-03
(049B)
Speed Agreement
Detection Level (+/-) Spd Agree Lvl+-
Sets the frequency detection level for digital output functions
H2-oo = 13, 14, 15, 16.
Default: 0.0 Hz
Min.: -400.0
Max.: 400.0
L4-04
(049C)
Speed Agreement
Detection Width (+/-) Spd Agree Wdth+-
Sets the hysteresis or allowable margin for speed detection.
Default: 2.0 kHz
Min.: 0.0
Max.: 20.0
L4-05
(049D)
Frequency Reference
Loss Detection
Selection
Ref Loss Sel
0: Stop
1: Run@L4-06PrevRef
0: Stop. Drive stops when the frequency reference is lost.
1: Run. Drive runs at a reduced speed when the frequency
reference is lost.
Default: 1
Range: 0, 1
B.9 L: Protection Function
YASKAWA SIEP YAIZ1D 01A Z1000U HVAC MATRIX Drive Bypass Technical Manual
331
B
Parameter List