YASKAWA HV600 Manual page 363

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L3-04: Stall Prevention during Decel
No.
Name
(Hex.)
L3-04 Stall Prevention during
Decel
(0492)
Note:
The setting range changes when the A1-02 [Control Method Selection] value changes:
• When A1-02 = 5 [OLV/PM], the setting range is 0 to 2.
• When A1-02 = 8 [EZOLV], the setting range is 0, 1.
Stall Prevention during deceleration controls the deceleration as specified by the DC bus voltage and does not let high
inertia or fast deceleration cause ov [Overvoltage] faults.
0 : Disabled
The drive decelerates as specified by the deceleration time. If the deceleration time is too short, the drive can detect an
ov fault.
1 : General Purpose
The drive decelerates as specified by the deceleration time. When the DC bus voltage is more than the Stall
Prevention level, the drive stops deceleration until the DC bus voltage is less than the Stall Prevention Level. The
drive then starts to decelerate at the set deceleration time. Frequent use of Stall Prevention will help prevent ov faults
when the deceleration time is shorter than the drive can usually accept.
Note:
The Decel Stall Prevention function will increase the deceleration time to stop and the deceleration time will be longer than the setting.
The input voltage setting of E1-01 [Input AC Supply Voltage] sets the DC bus voltage level for Stall Prevention.
Drive Input Voltage
208 V class
480 V class
Figure 2.91 shows the Stall Prevention during deceleration function.
2 : Intelligent (Ignore Decel Ramp)
YASKAWA TOEPYAIHV6002A HV600 Drive Programming
Figure 2.90 Stall Prevent Level during Accel/Limit
V/f OLV/PM EZOLV OLV/PM
Sets the method that the drive will use to prevent overvoltage faults when decelerating.
Table 2.59 Stall Prevention Level during Deceleration
Figure 2.91 Stall Prevention Operation during Deceleration
Description
Stall Prevention Level during Deceleration
377 V
754 V
2.9 L: Protection Functions
Default
(Range)
1
(Determined by A1-02)
2
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