Drooping Control; Reverse Run Prohibition - Toshiba TOSVERT VF-AS1 Instruction Manual

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
Reverse-run prohibition selection
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 (
slip frequency. In sensor vector control mode (
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.
Gain1
[Parameter setting]
Title
• Drooping control can be performed only when
• When torque over the insensitive torque is applied, the frequency is decreased (during power running) or 6
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
according to the magnitude of frequency.
• The error in drooping insensitive torque increases in the frequency range above the base frequency, and it is
therefore recommended that these functions be used at frequencies below the base frequency.
• During drooping control, the output frequency is not restricted by the maximum frequency (
Function
Internal torque
command
Drooping insensitive torque
Function
Drooping gain
Speed at drooping gain 0%
Speed at drooping gain
Drooping insensitive torque
Drooping output filter
Adjustment range
:Permit all, :Prohibit reverse run
:Prohibit forward run
) should be set at the same level as the
= , ), depending on the setting of
Gain2
– –
Drooping insensitive frequency
Adjustment range
~ %
~ Hz
~ Hz
~ %
~ rad/s
is set to , , or .
and
F-27
E6581301
Default setting
, the motor
Frequency
–
Default setting
.
, the degree of drooping changes
).
6