YASKAWA GA700 Technical Manual page 613

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b3-17: Speed Est. Retry Current Level
No.
Name
(Hex.)
b3-17 Speed Est. Retry
Current Level
(01F0)
The drive pauses operation to prevent overvoltage and overcurrent occurs when significant current flows during
Speed Estimation Speed Search. The speed search is reexecuted (retried) when the current reaches the level set in
b3-17.
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b3-18: Speed Est. Retry Detection Time
No.
Name
(Hex.)
b3-18 Speed Est. Retry
Detection Time
(01F1)
Retries the speed search when the current exceeds the current level set in b3-17 [Speed Est. Retry Current Level]
during the time set in b3-18.
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b3-19: Number of Speed Search Restarts
No.
Name
(Hex.)
b3-19 Number of Speed
Search Restarts
(01F2)
The drive will trigger SEr [Too Many Speed Search Restarts] if it reaches the number of Speed Search restarts set
here.
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b3-24: Speed Search Method Selection
No.
Name
(Hex.)
b3-24 Speed Search Method
Selection
(01C0)
Set b3-01 = 1 [Speed Search Selection at Start = Enabled] to execute Speed Search at start. Set L2-01 = 1
[Momentary Power Loss Ope Select = Enbl with Timer] to execute Speed Search once power is restored
following a momentary power loss.
1 : Speed Estimation
The drive estimates the motor speed based on residual voltage when using a short baseblock time.
If there is not enough residual voltage, then the drive will inject DC current into the motor to estimate the motor
speed.
2 : Current Detection 2
The drive detects motor speed by injecting DC current into the motor.
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b3-25: Speed Search Wait Time
No.
Name
(Hex.)
b3-25 Speed Search Wait
Time
(01C8)
Increase the setting value when the drive detects the following faults during speed searches.
• oC [Overcurrent]
YASKAWA ELECTRIC SIEP C710617 01B YASKAWA AC Drive GA700 Technical Manual
V/f CL-V/f OLV CLV AOLV
Configures the current level used to operate the search retry function for
Speed Estimation Speed Search, as a percentage, on the basis that the drive
rated current is the 100% value.
V/f CL-V/f OLV CLV AOLV
Configures the time until the speed search is reexecuted (retried) when a
speed search is interrupted due to significant current flowing during Speed
Estimation Speed Search.
V/f CL-V/f OLV CLV AOLV
Sets the number of times to restart Speed Search if Speed Search fails.
V/f CL-V/f OLV CLV AOLV
Selects the type of Speed Search to perform when starting the motor, or
when power is restored following a momentary power loss.
V/f CL-V/f OLV CLV AOLV
Configures the wait time used until the speed search retry function is
executed.
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
Description
OLV/PM AOLV/PM CLV/PM EZOLV OLV/PM
11.3 b: Application
Default Setting
(Range)
150%
(0 - 200%)
Default Setting
(Range)
0.10 s
(0.00 - 1.00 s)
Default
(Range)
3 times
(0 - 10 times)
Default
(Range)
2
(1, 2)
Default Setting
(Range)
0.5 s
(0.0 - 30.0 s)
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