YASKAWA CIMR-ZU A Series Programming Manual page 108

1 8 L Protection Functions
Settin 2 Intelli ent Stall Pre ention
The drive disregards the selected acceleration time and attempts to accelerate in the minimum time. The acceleration rate is
adjusted so the current does not exceed the value set to parameter L3-02.
L 2 Stall Pre ention Le el durin Acceleration
Sets the output current level at which the Stall Prevention during acceleration is activated.
No
L3-02
<1> The upper limit and default values are determined by parameter L8-38, Carrier Frequency Derating Selection.
• Lower L3-02 if stalling occurs when using a motor that is relatively small compared to the drive.
• Also set parameter L3-03 when operating the motor in the constant power range.
L Stall Pre ention Limit durin Acceleration
The Stall Prevention level is automatically reduced when the motor is operated in the constant power range. L3-03 sets the
lower limit for this reduction as a percentage of the drive rated current.
No
L3-03
Stall Prevention level during Acceleration
L 22 Deceleration ime at Stall Pre ention durin Acceleration
Sets the brief deceleration time used when stalling occurs while accelerating a PM motor. When set to 0, this function is
disabled and the drive decelerates at the selected deceleration time when stalling occurs.
The function is effective only in OLV/ PM control and when parameter L3-01 is set to 1.
No
L3-22 Deceleration Time at Stall Prevention During Acceleration
L Stall Pre ention Selection durin Deceleration
Stall Prevention during deceleration controls the deceleration based on the DC bus voltage and prevents an overvoltage fault
caused by high inertia or rapid deceleration.
No
L3-04
<1> Settings 4 and 5 are not available in OLV/PM.
Settin Disabled
The drive decelerates according to the set deceleration time. With high inertia loads or rapid deceleration, an overvoltage fault
may occur. If an overvoltage fault occurs, use dynamic braking options or switch to another L3-04 selection.
1 8
Name
Stall Prevention Level during Acceleration
Name
Stall Prevention Limit during Acceleration
E1-06
Base frequency
Fi ure 1 Stall Pre ention Le el and Limit Durin Acceleration
Name
Name
Stall Prevention Selection During Deceleration
Settin
0 to 150%
Settin
0 to 100%
L3-02
L3-03
Output frequency
Settin
0.0 to 6000.0 s
Settin
0, 1, 2, 4, 5
an e De ault
<1> <1>
an e De ault
50%
an e De ault
0.0 s
an e De ault
1
<1>