YASKAWA GA800 Technical Reference page 739

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b3-18: Speed Est Retry Detection Time
No.
Name
(Hex.)
b3-18 Speed Est Retry Detection
Time
(01F1)
Expert
When the current is more than the level set in b3-17 [Speed Est Retry Current Level] during the time set in b3-18, the
drive tries speed search again.
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b3-19: Speed Search Restart Attempts
No.
Name
(Hex.)
b3-19 Speed Search Restart
Attempts
(01F2)
If the drive does the number of Speed Search restarts set in this parameter, it will trigger an SEr [Speed Search Retries
Exceeded] error.
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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)]
–2004 to 2313, 4002 to 4302, T103 to T302: 1
–2360, 2415, 4371 to 4720, T371 to T720: 2
–E9-01 = 1, 2 [Permanent Magnet (PM), Synchronous Reluctance (SynRM)]: 1
• When you set A1-02 = 8 and E9-01 = 1 or 2, also set b3-24 = 1. If b3-24 = 2, the drive will detect oPE08 [Parameter Selection Error].
• When you set b3-24, it will trigger the drive to initialize b3-14 [Bi-directional Speed Search]. After you set b3-24, set b3-14.
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]
YASKAWA SIEPC71061737D GA800 Drive Technical Reference
V/f CL-V/f OLV CLV AOLV
Sets the length of time that the drive will wait to retry Speed Estimation Speed Search when too
much current flow stopped the Speed Search.
V/f CL-V/f OLV CLV AOLV
Sets the number of times to restart Speed Search if Speed Search does not complete.
V/f CL-V/f OLV CLV AOLV
Sets the Speed Search method when you start the motor or when you restore power after a
momentary power loss.
V/f CL-V/f OLV CLV AOLV
Sets the length of time the drive will wait to start the Speed Search Retry function.
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
12.3 b: Application
Default
(Range)
0.10 s
(0.00 - 1.00 s)
Default
(Range)
3 times
(0 - 10 times)
Default
(Range)
2
(1, 2)
Default
(Range)
0.5 s
(0.0 - 30.0 s)
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