Amtech Axpert-Eazy Series Instruction Manual page 143

D202: Minimum Frequency (Hz)
This is the minimum output frequency of the AC DRIVE when auxiliary drive is selected.
In terminal mode, this is the minimum output attained with minimum analog input reference. This
value should always be lower than the maximum frequency D203. The minimum frequency will be
reached after start command with selected acceleration ramp up time.
D203: Maximum Frequency (Hz)
This is the maximum output frequency of the AC DRIVE when auxiliary drive is selected.
In terminal mode, this is the maximum output attained with maximum analog input reference.
D204: Frequency Reference Input
This parameter can be used to select the speed reference input when auxiliary drive is selected. The
speed reference can be independently selected from the given options even if the AC DRIVE is
controlled from any of three sources, i.e. Local (Digital Operation Panel), Terminal or Serial. The
minimum and maximum limits are decided by D202 and D203 respectively in all the options. The
options are same as for the main AC DRIVE. Refer A106 for the detail information.
D205: Line Speed Setting (rpm)
The entered value will be displayed as motor speed in M102 at 50Hz, when auxiliary drive is
6
selected.
The final speed of the driven load can be displayed by this parameter. The value to be entered can be
derived at with following formula:
Parameter Value = 50 x Desired rpm / Set output frequency
Suppose a line speed of 273 is to be displayed when the output is 90Hz.
Parameter Value = 50 X 273 / 90 = 151.667 = 152
Now, at 90Hz the motor speed M102 will show (152 X 90 / 50) i.e. 274 rpm.
D206: Acceleration Time-1 (Sec)
Acceleration Time-1 is the time taken by AC DRIVE output frequency to ramp up from zero frequency
to maximum frequency D203, when auxiliary drive is selected.
Short acceleration time can result in excessive output current and if it exceeds the Acceleration
current limit D403, the acceleration will cease until the current reduces below the D403 value. In such
case, the actual acceleration time will differ from programmed value. The AC DRIVE may trip in drive
over load fault if the condition persists for long time. Increase acceleration time in such cases.
D207: Deceleration Time-1 (Sec)
Deceleration Time-1 is the time taken by AC DRIVE output frequency to ramp down from maximum
frequency D203 to zero frequency.
Short deceleration time can result in excessive output current and if it exceeds the Stall current limit
D401, the deceleration will cease until the current reduces below the D401 value. In such case, the
actual deceleration time will differ from programmed value. The AC DRIVE may trip in drive over load/
dc bus over voltage fault if the condition persists for long time. Increase deceleration time in such
cases.
GROUP – 3: TORQUE BOOST & DC BRAKING
D301: Manual Torque Boost setting (%)
This parameter is for the auxiliary drive. When setting manually, set the boost voltage at 0 Hz as a
percentage in respect to the motor voltage D101. When programmed to zero, it will be disabled. This
is automatically adjusted by the automatic tuning.
Axpert-Eazy AC Variable Frequency Drive
6-97