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H69 Automatic Deceleration
The moment a regenerative energy exceeding the braking capacity of inverter is
returned during deceleration, the inverter will stop its output and enter overvoltage
Alarm mode. If regenerative energy suppressing control is enabled, the inverter
lengthens the deceleration time to 3 times the preset time and decreases the de-
celeration torque to 1/3 when the DC link bus voltage exceeds the preset voltage
suppressing level. In this way, the inverter makes the motor reduce the regenerative
energy tentatively.
This control is used to suppress the torque generated by the motor in
deceleration. Conversely, when the load on the motor results in a braking
effect, the control does not have any effect, so do not use it in this case.
Disable this control when the inverter features a braking resistor. If it is
enabled, the braking resistor and regenerative energy suppressing control
may conflict with each other, which may change the deceleration time
unexpectedly.
H70 Overload Prevention Control
Enables or disables the overload suppressing control. If enabled, this function code
is used to set the deceleration (Hz/s).
Before the inverter enters Alarm mode due to the heat sink overheat or overload
(alarm code:
0h1
or
0lu
), this control decreases the output frequency of the
inverter 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 proceed to drive such kind of equip-
ment even the inverter slows down the output frequency, enable this control.
Do not use this control to equipment whose load does not slow if the
inverter output frequency drops, as it will have no effect.
If the following functions to limit the output current are enabled (F43 ≠ 0
and H12 = 1), this control does not work.
H96 STOP Key Priority/Start Check Function
The inverter can be operated using a functional combination of "Priority on STOP
Key" and "Start Check."
STOP key priority
Pressing the
key on the keypad forces the inverter to decelerate and stop the
motor even if the inverter is running by any run commands given via the terminals or
communications (link operation). After the motor stops, the inverter issues alarm
er6
.
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