
Program features 93
Settings and diagnostics
Parameters
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Events: -
Other programmable protection functions
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)
Five different event signals from the process can be connected to selectable inputs to
generate trips and warnings for the driven equipment. When the signal is lost, an
external event (fault, warning, or a mere log entry) is generated.
Motor phase loss detection (parameter
The parameter selects how the drive reacts whenever a motor phase loss is detected.
The motor phase loss detection is enabled by default and displays fault
whenever the drive detects a phase loss. The motor phase loss detection
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 (Only on ACS180-04S-... type, parameter
)
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 the hardware manual of the drive.
Swapped supply and motor cabling (parameter
)
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.
The drive protects the motor in a stall situation. It is possible to adjust the supervision
limits (current, frequency and time) and choose how the drive reacts to a motor stall
condition.
ACS180 FW.book Page 93 Tuesday, March 9, 2021 2:25 PM