Parameter Details
12
12.3 b: Application
YASKAWA SIEPC71061737D GA800 Drive Technical Reference 739
■ b3-18: Speed Est Retry Detection Time
No.
(Hex.)
Name Description
Default
(Range)
b3-18
(01F1)
Expert
Speed Est Retry Detection
Time
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.
0.10 s
(0.00 - 1.00 s)
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.
■ b3-19: Speed Search Restart Attempts
No.
(Hex.)
Name Description
Default
(Range)
b3-19
(01F2)
Speed Search Restart
Attempts
Sets the number of times to restart Speed Search if Speed Search does not complete.
3 times
(0 - 10 times)
If the drive does the number of Speed Search restarts set in this parameter, it will trigger an SEr [Speed Search Retries
Exceeded] error.
■ b3-24: Speed Search Method Selection
No.
(Hex.)
Name Description
Default
(Range)
b3-24
(01C0)
Speed Search Method
Selection
Sets the Speed Search method when you start the motor or when you restore power after a
momentary power loss.
2
(1, 2)
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.
■ b3-25: Speed Search Wait Time
No.
(Hex.)
Name Description
Default
(Range)
b3-25
(01C8)
Expert
Speed Search Wait Time
Sets the length of time the drive will wait to start the Speed Search Retry function.
0.5 s
(0.0 - 30.0 s)
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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