920
YASKAWA
SIEPC71061737B GA800 Drive Technical Reference
The stall prevention level set in
L3-02 [Stall Prevent Level during Accel]
is automatically reduced when the motor is
running within the constant output range. Parameter
L3-03
is the limit value used to prevent the stall prevention level
during constant output ranges to fall below the minimum required level.
Note:
The function to automatically reduce the stall prevention level does not operate when
L3-01 = 3 [Stall Prevention during Accel = Current
Limit Method]
.
Figure 12.133 Stall Prevent Level during Accel/Limit
■
L3-04: Stall Prevention during Decel
No.
(Hex.)
Name
Description
Default
(Range)
L3-04
(0492)
Stall Prevention during
Decel
Sets the method that the drive will use to prevent overvoltage faults when decelerating.
1
(Determined by A1-02)
Note:
1. To connect a dynamic braking option (braking resistor or braking resistor unit) to the drive, set this parameter to
0 or 3
. Parameter values
1, 2, 4, and 5
will enable Stall Prevention function during deceleration, and the dynamic braking option will not function.
2. 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 = 6, 7, 8 [AOLV/PM, CLV/PM, 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 : No
The drive decelerates as specified by the deceleration time. If the deceleration time is too short, the drive can detect an
ov
fault.
Note:
If an
ov
fault occurs, connect a dynamic braking option to the drive. If an
ov
fault occurs after you connect a dynamic braking option and
A1-
02 = 0 or 2 [Control Method Selection = V/f or CLV]
and
L3-04 = 0
, set
L3-04 = 3
.
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. This
function is not applicable for conveyor applications because the precision of the stop position is very important. As an alternative, use a
dynamic braking option in these applications.
The input voltage setting of
E1-01 [Input AC Supply Voltage]
sets the DC bus voltage level for Stall Prevention.
Table 12.68 Stall Prevention Level during Deceleration
Drive Input Voltage
Stall Prevention Level during Deceleration
200 V class
377 V
400 V class
754 V
V/f
CL-V/f
OLV
CLV
AOLV
OLV/PM
OLV/PM AOLV/PM CLV/PM
EZOLV
Содержание GA800 Series
Страница 2: ...This Page Intentionally Blank 2 YASKAWA SIEPC71061737B GA800 Drive Technical Reference...
Страница 20: ...i 3 Warranty Information 20 YASKAWA SIEPC71061737B GA800 Drive Technical Reference...
Страница 30: ...1 3 Features and Advantages of Control Methods 30 YASKAWA SIEPC71061737B GA800 Drive Technical Reference...
Страница 58: ...2 9 Installation Methods 58 YASKAWA SIEPC71061737B GA800 Drive Technical Reference...
Страница 144: ...4 4 Start up Procedures 144 YASKAWA SIEPC71061737B GA800 Drive Technical Reference Figure 4 8 Basic Steps before Startup...
Страница 268: ...5 6 Safe Disable Input 268 YASKAWA SIEPC71061737B GA800 Drive Technical Reference...
Страница 306: ...6 3 MEMOBUS Modbus Communications 306 YASKAWA SIEPC71061737B GA800 Drive Technical Reference...
Страница 370: ...7 10 Troubleshooting Without Fault Display 370 YASKAWA SIEPC71061737B GA800 Drive Technical Reference...
Страница 426: ...8 7 Storage Guidelines 426 YASKAWA SIEPC71061737B GA800 Drive Technical Reference...