Omron Q2V Series Technical Manual page 463

If there is not sufficient residual voltage, then the drive will inject DC current into the motor to estimate the motor
speed.
2 : Current Det2
The drive will inject DC current into the motor to estimate motor speed.
■
b3-25: SpSrch Wait Time
No.
Name
(Hex.)
b3-25 SpSrch 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]
■
b3-26: Dir. Determ. Level
No.
Name
(Hex.)
b3-26 Dir. Determ. Level
(01C7)
Expert
■
b3-29: SpSrch BackEMF Threshold
No.
Name
(Hex.)
b3-29 SpSrch BackEMF
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.
■
b3-31: SpSrch I Ref Level
No.
Name
(Hex.)
b3-31 SpSrch I Ref Level
(0BC0)
Expert
Set this parameter as a ratio of E2-03 [Mot No-Load Current]. The setting is a ratio with respect to 30% of the
motor rated current when E2-03 ≤ E2-01 [Mot Rated Current (FLA)] × 0.3.
Note:
The setting is a ratio with respect to E9-06 [Motor Rated Current] × 0.5 when A1-02 = 8 [Control Method = EZ Vector].
■
b3-32: SpSrch I End Level
No.
Name
(Hex.)
b3-32 SpSrch I End Level
(0BC1)
Expert
The Current Detection Speed Search gradually decreases the output frequency to search for the motor speed when
the output current is equal to or less than Speed Search Current Complete Level.
Set this parameter as a ratio of E2-03 [Mot No-Load Current]. The setting is a ratio with respect to 30% of the
motor rated current when E2-03 ≤ E2-01 [Mot Rated Current (FLA)] × 0.3.
Note:
The setting is a ratio with respect to E9-06 [Motor Rated Current] × 0.5 when A1-02 = 8 [Control Method = EZ Vector].
SIEPCYEUOQ2V01A Q2V Technical Manual
V/f OLV OLV/PM OLV/PM AOLV/PM EZOLV
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.
V/f OLV OLV/PM OLV/PM AOLV/PM EZOLV
Sets the current level that completes Speed Search.
Description
Description
Description
Description
Description
12.2 b: APPLICATION
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)
Default
(Range)
1.20
(0.00 - 1.49)
463
12