GE Fuji Electric AF-300 Mini Startup Manual page 77
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Also See for Fuji Electric AF-300 Mini:
- Instructions manual (78 pages) ,
- Instructions manual (44 pages)
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Retry latency time (H05)
Sets the latency time for automatic exit from Alarm
mode. Refer to the timing scheme diagram below.
Operation timing chart
Alarm
Alarm mode
H05
H05
Reset command
1st
Drive
output
frequency
Signal in the retry
operation
H07
Gradual Acceleration/Deceleration
Specifies the acceleration and deceleration patterns
(output frequency patterns).
Linear acceleration/deceleration
The drive runs the motor with the constant acceleration
and deceleration.
S-curved acceleration/deceleration
To reduce the impact that the drive motor gives its load
during acceleration/deceleration, the drive gradually
accelerates/decelerates the motor at the both ends of
the acceleration/deceleration zones.
Curvilinear acceleration/deceleration
The drive controls the motor for maximum performance,
with the following acceleration/deceleration pattern:
–
Linear acceleration/deceleration of constant torque
output for the motor in the zone under the base
frequency
–
Two times speed and a half acceleration/
deceleration at the base frequency in the zone over
the base frequency.
H12
Instantaneous Overcurrent Limiting
Selects whether the drive will perform current limiting
processing or cause an overcurrent trip if the output cur-
rent exceeds the instantaneous overcurrent limit level.
H05
H05
2nd
3rd
4th
Time
5-19
If instantaneous overcurrent limiting is enabled, the drive
will immediately turn off its output gates to suppress the
increase of current and control the output frequency.
If current limiting processing makes the motor decrease
its torque temporarily and causes a problem, then dis-
able the overcurrent limiting to cause an overcurrent trip
and apply brake to the motor.
NOTE: The same functions to limit the output current
are implemented by software as the function codes F43
and F44. Generally, software features have an operation
delay. Even if you have enabled the function codes F43
and F44, enable the function code H12.
H69 Regenerative Energy Suppressing
The moment that regenerative energy exceeding the
absorbtive capacity of drive occurs during motor
braking, the drive will trip and enter into Alarm mode
due to overvoltage. If regenerative energy suppressing is
enabled, the drive lengthens the deceleration time for 3
times the set time as long as the intermediate dc voltage
exceeds the preset voltage suppressing level, and de-
creases the deceleration torque for 1/3. In this way the
drive decreases the regenerative energy progressively.
This control is to suppress the torque generated by the
motor in deceleration. However when a load brakes the
motor the control has no effect, and should not be used.
When the drive features a braking resistor, disable this
control. Otherwise, the braking resistor and the control
may conflict with each other, and may adversely affect
the deceleration time.
H70
Overload Prevention Control
Enables overload suppressing control. If enabled, this
function code is used to set the deceleration (Hz/s).
Before the drive enters alarm mode due to the heat sink
overheating or an overload (alarm code: 0H1 or 0LU),
this control decreases the drive's output frequency to
suppress the trip.
Apply this control to equipment (such as pumps) whose
drive frequency drops in line with any decrease in load. If
you want to drive this kind of equipment even if the drive
reduces the output frequency, enable this control.
NOTE: Do not use this function with equipment whose
load does not diminish with reduced drive output
frequency, as it will have no effect.
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