These conditions apply to Speed Search operation. When A1-02 = 0, 1, 2 [Control Method Selection = V/f Control, V/f Control with Encoder, Open Loop Vector], set b3-24 [Speed Search Method Selection] before you do Speed Search.
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Do Speed Search with each Run Command
The drive ignores a Speed Search command from the external terminals.
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Use an MFDI to do an External Speed Search Command
To use an MFDI to do Speed Search, input the Run command at the same time that terminal Sx set for Speed Search activates, or after Speed Search activates.
Set Speed Search to H1-xx to do the function externally. You cannot set external Speed Search 1 and 2 at the same time.
Table 1. Execute Speed Search via the Digital Input Terminals
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H1-xx Setting
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Name
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Current Detection 2
|
Speed Estimation
|
|
61
|
Speed Search from Fmax
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ON: Speed Search starts from E1-04 [Maximum Output Frequency].
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External Speed Search commands 1 and 2 work the same.
The drive estimates the motor speed, then starts Speed Search from the estimated speed.
|
|
62
|
Speed Search from Fref
|
ON: Speed Search starts from the frequency reference immediately before you input the Speed Search command.
|
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Do Speed Search with Each Auto Restart
Set L5-01 [Number of Auto-Restart Attempts] = 1 or more. After an Auto Restart fault, the drive automatically does Speed Search.
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Do Speed Search after Momentary Power Loss
Set L2-01 = 1, 2 [Power Loss Ride Through Select = Enabled for L2-02 Time, Enabled while CPU Power Active].
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Do Speed Search after You Clear the External Baseblock Command
If you clear the external baseblock command, the drive will do Speed Search in these conditions;