YASKAWA GA700 Technical Manual page 848

11.9 L: Protection Function
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L3-05: Stall Prevent Select during Run
No.
Name
(Hex.)
L3-05 Stall Prevent Select
during Run
(0493)
Stall Prevention function during run prevents the motor from stalling by automatically reducing the speed when
an oL1 [Motor Overload] occurs while the motor is running at constant speed.
Note:
Stall Prevention function during run is disabled when the output frequency is 6 Hz or lower regardless of the setting of L3-05 and L3-06
[Stall Prevent Level during Run] if the output frequency falls below 6 Hz.
0 : Disabled
Drive runs at the set frequency reference. A heavy load may cause the motor to stall and trip the drive with an oC
[Overcurrent] or oL1.
1 : Decel time 1
The drive will decelerate for the time set in C1-02 [Deceleration Time 1] .If the current exceeds the Stall
Prevention level set in L3-06. When the current level drops below "L3-06 setting value - 2%" for 100 ms, drive
accelerates again for the acceleration time valid at that time until the set frequency is reached.
2 : Decel time 2
This setting functions in the same manner as setting 1. If the Stall Prevention function is enabled, the drive
decelerates with the value set in C1-04 [Deceleration Time 2].
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L3-06: Stall Prevent Level during Run
No.
Name
(Hex.)
L3-06 Stall Prevent Level
during Run
(0494)
Note:
• This parameter is valid if L3-05 = 1, 2 [Stall Prevent Select during Run = Decel time 1, Decel time 2].
• The upper limit and default for this setting is determined by C6-01 [Normal / Heavy Duty Selection] and L8-38 [Carrier Frequency
Reduction].
• Depending on the setting of L3-23 [CHP Stall P Selection] the level is automatically reduced in the constant power range.
Change the Stall Prevent Level during Run using Analog Input
When H3-xx = 8 [MFAI Function Select = Stall Prevention Level DuringRun], the stall prevention level during
run can be changed via the input gain and bias settings for terminals A1, A2, and A3.
If both the input level for terminals A1, A2, and A3 [H3-xx = 8] and L3-06 are set, the smaller value is the
effective Stall Prevent Level during Run.
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L3-11: OV Suppression Function Select
No.
Name
(Hex.)
L3-11 OV Suppression
Function Select
(04C7)
848
V/f CL-V/f OLV
Enables or disables the Stall Prevention During Run function.
V/f CL-V/f OLV
Sets the current level to trigger Stall Prevention during run. A setting of
100% is equal to the drive rated current.
Stall Prevention Level during Run (%)
100
30
0 3 V
(4 mA) (8.8 mA)
Figure 11.132 Stall Prevention Level during Run using Analog Input
V/f CL-V/f OLV
Enables or disables the overvoltage suppression function.
YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual
Description
CLV AOLV OLV/PM OLV/PM AOLV/PM CLV/PM EZOLV
Description
CLV AOLV OLV/PM OLV/PM AOLV/PM CLV/PM EZOLV
Input level of multi-function
analog input terminals A1,
10 V
A2, and A3
(20 mA)
Description
CLV AOLV OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Default Setting
(Range)
Determined by A1-02
(0 to Determined by
A1-02)
Default
(Range)
Determined by C6-01
and L8-38
(30 - 150%)
Default
(Range)
0
(0, 1)