Axpert-Eazy
AC Variable Frequency Drive
6-97
6
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
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.
Содержание Axpert-Eazy AMT-011-4
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