L9: Drive Protection 2; N: Special Adjustment; N1: Hunting Prevention - YASKAWA CIPR-CR70A Series Technical Manual

11 Parameter Details
L8-55: Internal DB TransistorProtection
No.
Name
(Hex.)
L8-55 Internal DB
TransistorProtection
(045F)
0 : Disable
Disables braking transistor protection.
Use this setting in the following situation. Enabling the braking transistor in the following situations may cause an
rF [Braking Resistor Fault].
• When using a regenerative converter, such as the D1000.
• When using a regenerative unit, such as the R1000.
• When connecting braking resistor options to the drive, such as CDBR units.
• When using no internal braking transistor.
1 : Protection Enabled
Protects internal braking transistor when using a braking transistor or optional braking resistors.
The following models have a built-in braking transistor .
• 2003 to 2115
• 4002 to 4150
■

L9: Drive Protection 2

L9 parameters are used to configure the protection function used to detect cooling fan faults.
L9-16: FAn1 Detect Time
No.
Name
(Hex.)
L9-16 FAn1 Detect Time
(11DC)
Expert
◆

n: Special Adjustment

n parameters are used to set the following functions.
• Hunting Prevention
• Motor line-to-line resistance online tuning
• Fine tune the parameters that adjust motor control
■

n1: Hunting Prevention

The Hunting Prevention function will not let low inertia or operation with a light load cause hunting. Hunting
frequently occurs when you have a high carrier frequency and an output frequency less than 30 Hz.
n1-01: Hunting Prevention Selection
No.
Name
(Hex.)
n1-01 Hunting Prevention
Selection
(0580)
Disable this function to prioritize responsiveness over motor vibration reduction.
Greater suppression of hunting can be obtained by selecting n1-01 = 2 if hunting occurs, or when using a high
carrier frequency.
0 : Disabled
1 : Enabled (Normal)
2 : Enabled (High Carrier Frequency)
726
Description
V/f CL-V/f OLV CLV AOLV
Enables or disables protection for the internal braking transistor.
Description
V/f CL-V/f OLV CLV AOLV
Sets the detection time for FAn1 [Drive Cooling Fan Failure]. Yaskawa
recommends that you do not change this parameter value.
Description
V/f CL-V/f OLV CLV AOLV
Enables or disables the hunting prevention function.
YASKAWA ELECTRIC SIEP C710617 19A YASKAWA AC Drive CR700 Technical Manual
Default
(Range)
1
(0, 1)
Default
(Range)
4.0 s
(0.0 - 30.0 s)
Default
(Range)
Determined by o2-04
(0 - 2)