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E6581528
F-27
6
6.14.4 Reverse run prohibition
: Reverse run prohibition selection
• Function
This function prevents the motor from running in the forward or reverse direction when it receives the wrong
operation signal.
[Parameter setting]
Title Function Adjustment range Default setting
Reverse-run prohibition selection
:Permit all, :Prohibit reverse run
:Prohibit forward run
Warning!
!
• If an operation command is entered to rotate the motor in the direction prohibited for the preset speed
operation with the mode or forced jog operation, this parameter will cancel the command regardless of
operation mode.
• If the motor constant is not set properly while vector control mode or automatic torque boost mode is
selected, the motor may turn in the reverse direction. The number of revolutions that correspond to the slip
frequency, in these modes, therefore, the stop frequency () should be set at the same level as the
slip frequency. In sensor vector control mode (=, ), depending on the setting of , the motor
restarted may rotate in the direction opposite to the prohibited direction regardless of the setting of this
parameter.
6.15 Drooping control
: Drooping gain
: Speed at drooping gain 0%
: Speed at drooping gain
: Drooping insensitive torque
: Drooping output filter
• Function
When multiple inverters and motors are used to operate a system, the load can distribute to them using this
function. These parameters allow you to adjust the frequency range, and also insensitive torque and gain.
Frequency
Drooping gain
Drooping insensitive torque
Internal torque
command
Drooping gain
–
–
–
Drooping insensitive frequency
Gain2
Gain1
[Parameter setting]
Title Function Adjustment range Default setting
Drooping gain [Note] ~ %
Speed at drooping gain 0% ~ Hz
Speed at drooping gain ~ Hz
Drooping insensitive torque ~ %
Drooping output filter ~ rad/s
Note: Drooping gain can be changed within a range of 0.1 to 100.0% during operation. When changing the setting
to 0.0 (no drooping) or 0.0, stop operation.
• Drooping control can be performed only when is set to , , or .
• When torque over the insensitive torque is applied, the frequency is decreased (during power running) or
increased (during regenerative braking).
• The drooping function is operative at frequencies over the frequency set with .
• In the frequency range between the frequencies set with and , the degree of drooping changes
according to the magnitude of frequency.