YASKAWA CIPR-GA50C series Technical Manual page 495

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b3-24: Speed Search Method Selection
No.
Name
(Hex.)
b3-24 Speed Search Method
Selection
(01C0)
Note:
• When A1-02 = 8 [Control Method Selection = EZOLV], the default setting changes when the setting for E9-01 [Motor Type Selection]
and the drive model change.
–E9-01 = 0 [Induction (IM)]
–E9-01 = 1, 2 [Permanent Magnet (PM), Synchronous Reluctance (SynRM)]: 1
• When you set A1-02 = 8 and E9-01 = 1 or 2, set b3-24 = 1. If b3-24 = 2, the drive will detect oPE08 [Parameter Selection Error].
Set b3-01 = 1 [Speed Search at Start Selection = Enabled] to do Speed Search at start. Set L2-01 = 1 [Power
Loss Ride Through Select = Enabled for L2-02 Time]] to do Speed Search after you restore power after a
momentary power loss.
1 : Speed Estimation
The drive uses the residual voltage from a short baseblock time to estimate the motor speed.
If there is not sufficient residual voltage, then the drive will inject DC current into the motor to estimate the motor
speed.
2 : Current Detection 2
The drive will inject DC current into the motor to estimate motor speed.
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b3-25: Speed Search Wait Time
No.
Name
(Hex.)
b3-25 Speed Search Wait Time
(01C8)
Expert
If the drive detects these faults during speed search, increase the setting value:
• oC [Overcurrent]
• ov [Overvoltage]
• SEr [Speed Search Retries Exceeded]
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b3-26: Direction Determination Level
No.
Name
(Hex.)
b3-26 Direction Determination
Level
(01C7)
Expert
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b3-29: Speed Search Back-EMF Threshold
No.
Name
(Hex.)
b3-29 Speed Search Back-EMF
Threshold
(077C)
Expert
To make adjustments, gradually decrease the setting value. If you decrease the setting value too much, speed
search will not operate correctly.
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b3-31: Spd Search Current Reference Lvl
No.
Name
(Hex.)
b3-31 Spd Search Current
Reference Lvl
(0BC0)
Expert
YASKAWA SIEPC71061753A GA500 Technical Manual
V/f OLV OLV/PM OLV/PM AOLV/PM EZOLV
Sets the Speed Search method when you start the motor or when you restore power after a
momentary power loss.
V/f OLV OLV/PM AOLV/PM EZOLV OLV/PM
Sets the length of time the drive will wait to start the Speed Search Retry function.
V/f OLV OLV/PM OLV/PM AOLV/PM EZOLV
Sets the level to find the motor rotation direction. Increase the value if the drive cannot find the
direction.
V/f OLV OLV/PM OLV/PM AOLV/PM EZOLV
Sets the induced voltage for motors that use Speed Search. The drive will start Speed Search
when the motor induced voltage level is the same as the setting value. Usually it is not necessary
to change this setting.
V/f OLV OLV/PM AOLV/PM EZOLV OLV/PM
Sets the current level that decreases the output current during Current Detection Speed Search.
Description
Description
Description
Description
Description
12.3 b: Application
Default
(Range)
2
(1, 2)
Default
(Range)
0.5 s
(0.0 - 30.0 s)
Default
(Range)
1000
(40 to 60000)
Default
(Range)
10%
(0 - 10%)
Default
(Range)
1.50
(1.50 - 3.50)
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