YASKAWA CIMR-VU BA0001 Technical Manual page 242

5.9 n: Special Adjustments
No.
n3-01 High Slip Braking Deceleration Frequency Width
n n3-02: High Slip Braking Current Limit
Sets the maximum current to be output during an HSB stop as a percentage of motor rated current (E2-01). Reducing the
current limit increases the deceleration time. Make sure that this value does not exceed 150% of the drive's current rating.
No.
n3-02
n n3-03: High Slip Braking Dwell Time at Stop
When the motor reaches a relatively low speed at the end of HSB, the output frequency is kept at the minimum output frequency
E1-09 for the time set in n3-03. Increase this time if the inertia is very high and the motor is still coasting after HSB is complete.
No.
n3-03
n n3-04: High Slip Braking Overload Time
Sets the time required for an HSB overload fault (oL7) to occur when the drive output frequency does not change for some
reason during an HSB stop.
No.
n3-04
n n3-13: Overexcitation Deceleration Gain
Applies a gain to the V/f pattern output value during overexcitation deceleration, thereby determining the level of
overexcitation. The drive returns to the normal V/f value after the motor has stopped or when it is accelerating to the frequency
reference.
No.
n3-13
The optimum setting for n3-13 depends on the motor flux saturation characteristics.
• Increase the gain by 1.25 to 1.30 to improve the breaking power of overexcitation.
• Reduce the value when the motor slip gets too high, which can trigger overcurrent (oC), motor overload (oL1), or drive
overload (oL2) faults. Alternatively reduce n3-21.
n n3-21: High Slip Suppression Current Level
If overcurrent, oL1, or oL2 occur during overexcitation deceleration, reduce the overslip suppression current level. Set as a
percentage of the drive rated current.
Reduce this setting if the current during overexcitation deceleration exceeds the overslip suppression current set in n3-21 as
a result of flux saturation and excessive slip. Alternatively reduce the overexcitation gain n3-13.
No.
n3-21
n
n3-23: Overexcitation Operation Selection
Determines which direction overexcitation can be used in. However, parameter L3-04 must be set to 4 in order for n3-23 to
be enabled.
No.
n3-23
Setting 0: Enabled in Both Directions
Setting 1: Enabled in Forward Direction Only
Setting 2: Enabled in Reverse Direction Only
242
Name
Name
High Slip Braking Current Limit
Name
High Slip Braking Dwell Time at Stop
Name
High Slip Braking Overload Time
Name
Overexcitation Deceleration Gain
Name
Overslip Suppression Current Level
Name
Overexcitation Operation Selection
YASKAWA ELECTRIC SIEP C710606 18F YASKAWA AC Drive – V1000 Technical Manual
Setting Range
1 to 20%
Setting Range
100 to 200%
Setting Range
0.0 to 10.0 s
Setting Range
30 to 1200 s
Setting Range
1.00 to 1.40
Setting Range
0 to 150%
Setting Range
0 to 2
Default
5%
Default
150%
Default
1.0 s
Default
40 s
Default
1.10
Default
100%
Default
0