ABB ACS560, Руководство по прошивке

Страница: 90 / 514

90 Program features
needs to be enabled or disabled based on the motor control mode and the nominal
current as follows:
• With the vector control, the motor phase loss detection is always on and there are
no operational limits.
• With the scalar control, the motor phase loss detection activates when the motor
frequency is above 10% of the motor nominal frequency. This limit cannot be
changed.
With motors having nominal current below 1/6 of drive nominal current, the
supervision must be disabled as the drive cannot measure the motor current
accurately.
Safe torque off detection (parameter 31.22 )
The drive monitors the status of the Safe torque off input, and this parameter selects
which indications are given when the signals are lost. (The parameter does not affect
the operation of the Safe torque off function itself). For more information on the Safe
torque off function, see chapter
Planning the electrical installation , section
Implementing the Safe torque off function in the Hardware manual of the drive.
Swapped supply and motor cabling (parameter 31.23 )
The drive can detect if the supply and motor cables have accidentally been swapped
(for example, if the supply is connected to the motor connection of the drive). The
parameter selects if a fault is generated or not.
Current limit function (parameters 30.09 , 30.17 , and 30.10 )
The drive monitors the maximum current limit, its related parameters and helps the
motor not to reach its stall current limit. The maximum current, monitoring time, and
how the drive should react to these conditions can be set in the parameters
30.17 ,
30.09 , and 30.10 respectively .
By default, when the drive reaches the maximum current limit and exceeds the
monitor time, a warning message (
A8B6 ) is displayed.
Stall function (parameters 31.24 … 31.28 )
The drive monitors the stall current limit, its related parameters and helps to prevent
stalling of the motor. You can adjust the supervision limits (current, frequency and
time) and choose how the drive reacts to a stall condition.