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E6581528
F-44
6
(1) = (In sync with acceleration/deceleration)
The increase in operation frequency is inhibited by the activation of the torque limit function. In this control mode,
therefore, the actual speed is always kept in sync with the operation frequency. The operation frequency restarts
to increase when torque decreases as a result of the release of the mechanical brake, so the time required for the
specified speed to be reached is the sum of the delay in operation of the mechanical brake and the acceleration
time.
Frequency [Hz]
Time [s]
Torque [N·m]
Time [s]
Torque limit level
Actual speed
If the torque limit function
is not activated
Operation frequency
Time [s]
Mechanical brake
ON
OFF
(released)
(2) =(In sync with min. time)
The operation frequency keeps increasing, even if the torque limit function is activated.
In this control mode, the actual speed is kept in sync with the operation frequency, while torque is held at a limit
level when it decreases as a result of the release of the mechanical brake. The use of this function prevents the
load from failing and improves the motor’s response during inching operation.
Frequency [Hz]
Torque [N·m]
Torque limit level
Mechanical brake
Time [s]
Actual speed
(Acceleration rates vary depending
on the torque limit level.)
Operation frequency
Time [s]
Time [s]
ON
OFF
(released)
Torque is held at a limit level even
after the mechanical brake is released.