Amtech Axpert-Eazy Series Instruction Manual page 115

operation) as the reference. When using for loads with sudden torque fluctuations, and the output
frequency drops remarkably with the stall current limit function, set an appropriately high value.
Note) Slipping will increase during high-efficiency operation, so it is recommended to execute
automatic tuning before operation and set the manual torque boost selection to valid (A501).
Normally for the V/f constant operation, the no-load loss is large with a light load, and the motor
efficiency drops remarkably. Thus, according to the load, the output voltage is reduced using the B324
setting value as the lower limit in respect to the voltage set with V/f, and the motor efficiency is
improved.
GROUP – 4: PRESET SPEED
B401 ~ B407: Preset Speed 1 ~ 7 (Hz)
This is frequency setting for different preset speeds. The drive supports eight different speeds that
can be set by three programmable sequence input using parameters C101 ~ C106 and C114 ~ C115.
The following preset speed can be selected with the sequence input commands Preset i/p-0, Preset
i/p-1 and Preset i/p-2. Set desire frequencies in B401 ~ B407. When no sequence input is present,
the set frequency will be decided by the Frequency reference input A106.
Preset i/p-2 Preset i/p-1
OFF OFF
OFF OFF
OFF ON
OFF ON
ON OFF
ON OFF
ON ON
ON ON
The Start Control A301 determines the direction of rotation. If Local (Digital Operation Panel) is
selected as start control, the direction can be change only through parameter A305. When Terminal is
selected as start control, the status of sequence input terminal would decide the direction.
The preset speed can be set higher than max frequency A103 up to 600Hz. However, the output
frequency will not exceed the maximum frequency A103.
Axpert-Eazy AC Variable Frequency Drive
Preset i/p-0 Speed Selected
Normal Speed Reference (A106)
OFF
ON Preset Speed 1 (B401)
OFF Preset Speed 2 (B402)
ON Preset Speed 3 (B403)
OFF Preset Speed 4 (B404)
Preset Speed 5 (B405)
ON
OFF Preset Speed 6 (B406)
ON Preset Speed 7 (B407)
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