Safety And Protections; Fixed/Standard Protections; Emergency Stop - ABB ACQ580 Firmware Manual

Safety and protections



Fixed/Standard protections

Overcurrent
If the output current exceeds the internal overcurrent limit, the IGBTs are shut down
immediately to protect the drive.
DC overvoltage
See section Overvoltage control
DC undervoltage
See section Undervoltage control (power loss ride-through)
Drive temperature
If the temperature rises high enough, the drive first starts to limit the switching
frequency and then the current to protect itself. If it is still keeps heating up, for
example because of a fan failure, an overtemperature fault is generated.
Short circuit
In case of a short circuit, the IGBTs are shut down immediately to protect the drive.


Emergency stop

The emergency stop signal is connected to the input selected by parameter
Emergency stop source. An emergency stop can also be generated through fieldbus
(parameter 06.01 Main control
The mode of the emergency stop is selected by parameter
mode. The following modes are available:
• Off1: Stop along the standard deceleration ramp defined for the particular
reference type in use
• Off2: Stop by coasting
• Off3: Stop by the emergency stop ramp defined by parameter
stop time.
• Stop torque.
With Off1 or Off3 emergency stop modes, the ramp-down of the motor speed can be
supervised by parameters
ramp supervision delay.
on page 80.
word, bits 0...2).
31.32 Emergency ramp supervision
Program features 83
on page 80.
21.05
21.04 Emergency stop
23.23 Emergency
and 31.33 Emergency