YASKAWA GA700 Series Technical Manual page 663

The drive detects the direction of motor rotation during Speed Search.
■
b3-17: Speed Est Retry Current Level
No.
Name
(Hex.)
b3-17 Speed Est Retry Current
Level
(01F0)
Expert
When a large quantity of current flows during Speed Estimation Speed Search, the drive temporarily stops
operation to prevent overvoltage and overcurrent. When the current is at the level set in b3-17, the drive tries
speed search again.
■
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.
■
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.
■
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 4296: 1
–2360, 2415, 4371 to 4675: 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.
YASKAWA SIEPC71061705H GA700 Series Technical Manual
V/f CL-V/f OLV CLV AOLV
Sets the current level for the search retry function in Speed Estimation Speed Search as a
percentage where drive rated current is a setting value of 100%.
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.
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)
150%
(0 - 200%)
Default
(Range)
0.10 s
(0.00 - 1.00 s)
Default
(Range)
3 times
(0 - 10 times)
Default
(Range)
2
(1, 2)
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