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Note:
During the limit time of the shutdown and restart, the operation command command is not responded.
F07.15: Insufficient lower limit frequency action selection
Code
Name
(Addr.)
F07.15
Insufficient lower limit
(0x070F)
frequency
RUN
selection
Note: This function is valid when there is a running command and the output frequency is lower than the lower limit frequency, such as the positive and
negative zero crossing state. Invalid during stop deceleration.
0: Run by frequency command
normal operation.
1: Enter the pause state and block the output.
When the given frequency and output frequency are less than or equal to the lower limit frequency, the output is blocked and the pause state is entered,
and the motor is free to stop running.
When the given frequency is greater than the lower limit frequency after entering the pause state, the pause state is exited and the normal start control is
entered.
2: Run at the following frequency limit
When the given frequency and output frequency are less than or equal to the lower limit frequency, the limit frequency output is pressed.
3: Zero speed operation
When the given frequency and output frequency are less than or equal to the lower limit frequency, decelerate to zero frequency, perform zero speed
control, and enter zero speed torque function control in open loop vector or VF mode.
When the given frequency is greater than the lower limit frequency after entering the zero speed control, the zero speed control is exited and the normal
start control is entered.
Note:
When F07.10 = 1 [stop mode = free stop], this function judgment is not performed.
F07.16 ~ F07.17 zero speed torque retention
Code
Name
(Addr.)
F07.16
Zero
speed
(0x0710)
holding current
RUN
F07.17
Zero
speed
(0x0711)
holding time
RUN
Zero speed torque holding current:
100.0% corresponds to the rated current of the drive, but the zero-speed torque holding current is limited by the rated current of the motor.
When the output frequency decelerates to the F07.02 starting frequency, it enters the zero speed torque control state.
The zero speed torque holding current value affects the magnetic field strength of the fixed motor shaft. Increasing the current value will increase the
amount of heat generated by the motor. Set the minimum current required to fix the motor shaft.
Zero speed torque holding time:
Set the time that the zero speed torque function is maintained. When the output frequency is less than the F07.02 start frequency, the timing starts.
Zero speed torque function effective condition
Condition
control method
Operating status
Output frequency threshold
Code
Name
(Addr.)
F07.18
Positive reversal dead
(0x0712)
time
STOP
When the forward/reverse command is switched, the zero frequency is entered into the positive and negative dead zone state, and the timing is started.
The timing is cleared after exiting the positive and negative dead zone status.
Exit the positive and negative dead zone status:
Exit method
Positive reversal of dead time to
Reverse command
Stop command
Content
V/F SVC
action
Set the action when the output frequency is less than the lower limit
frequency during the running process.
Content
torque
V/F SVC
100.0% corresponds to the rated current of the drive
V/F SVC
torque
Set the time that the zero speed torque function is maintained. Set 6000.0s
zero speed torque is not limited by time
Name
Vector control or V/F control
Normal running state, non-stop deceleration
Less than F07.02 starting frequency, enter zero speed running state
Content
V/F SVC
When the forward and reverse switching is performed, the time is
maintained at zero speed.
Control form after exit
Enter normal start control
Enter normal start control
Enter shutdown control
151
Parameter details
Factory setting
(Setting range)
0
(0 ~ 33)
Factory setting
(Setting range)
60.0%
(0.0 ~ 150.0%)
0.0s
(0.0 ~ 6000.0s)
Factory setting
(Setting range)
0.0s
(0.0 ~ 120.0s)
AC10 Series Frequency Inverter Technical Manual
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