Execution sequence
This function can be executed by a command issued by an upper device or a servo drive unit. Whether it is
executed by the upper device or servo drive unit is selected by Pn008=n.
X
(function selection under
voltage).
◆ When executed by the upper device (Pn008=n.1)
Upper device limits the torque after receiving an under voltage (A.971) warning.
After receiving the undervoltage warning release signal, the torque limit is released.
◆ When torque limitation is performed by servo drive unit (Pn008=n.
2
)
According to the under-voltage warning, a torque limit is applied inside the servo drive.
After receiving the undervoltage warning release signal, the torque limit value is controlled inside the servo
drive according to the set time.
Setting of Undervoltage (A.971) Warning
Set whether A.971 (undervoltage) warning is detected.
Under voltage warning is not detected.
The undervoltage warning is detected, and the torque limit is
executed by the upper device.
The undervoltage warning is detected, and torque limitation is
performed by Pn424 (torque limitation when the main circuit
voltage is reduced) and Pn425 (torque limitation is performed
according to the torque limitation release time when the main
circuit voltage is reduced).
(executed by servo drive unit)
◆ Relevant parameters
Main circuit input
power supply
Main circuit power cut-off time
By limiting the output torque, the bus voltage
of the main circuit is gradually reduced.
The bus voltage of the main
circuit rises after the main
circuit power supply is
restored
Undervoltage (A.971)
Warning
Limit torque after receiving
undervoltage warning
Undervoltage warning
status
Main circuit input
power supply
Main circuit power cut-off time
By limiting the output torque, the bus voltage of the
main circuit is gradually reduced.
The bus voltage of the
main circuit rises after
the main circuit power
supply is restored
Undervoltage (A.971)
Warning
To Next Page
Loading...