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iC2-Micro-Frequenzumrichter
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2.1.1.8 Frequency Bypass
Specific motor frequencies can be bypassed during operation. The feature helps to minimize and avoid mechanical resonance of
the machine, limiting vibration and noise of the system.
2.1.1.9 Automatic Restart
In case of a minor fault and trip, the drive can do an automatic restart, eliminating a manual reset of the drive. This enhances auto-
mated operation in remotely controlled systems. Make sure that dangerous situations cannot occur when using automatic restart.
2.1.1.10 Flying Start
Flying start enables the drive to synchronize to a freely spinning motor, before taking control of the motor. Taking over control of
the motor at the actual speed minimizes mechanical stress to the system. For example, the feature is relevant in fan and centrifuge
applications.
2.1.1.11 Mains Dropout
In case of mains dropout, where the drive cannot continue operation, it is possible to select predefined actions, for example trip,
coast, or performing a controlled ramp down.
2.1.1.12 Kinetic Backup
Kinetic backup enables the drive to remain in control in case there is sufficient energy in the system, for example, as inertia or when
lowering a load. This allows a controlled stop of the machine.
2.1.1.13 Resonance Damping
High frequency motor resonance noise can be eliminated through the use of resonance damping. Both automatic and manually
selected frequency damping are available.
2.1.1.14 Mechanical Brake Control
In applications like simple hoists, palletizers, stereoscopic warehouse, or downhill conveyors, a mechanical brake is used to keep the
load at standstill, when the motor is not controlled by the drive or when power is turned off.
The mechanical brake control feature ensures a smooth transition between the mechanical brake and motor holding the load, by
controlling the activation and deactivation of the mechanical brake.
2.1.1.15 Controllers
The drive has 3 different controllers providing optimized control of the actual application. The controllers cover
•
Process control
•
Speed control open loop
•
Torque control open loop
2.1.1.15.1 Process Controller
The process controller can control a process, for example in a system where a constant pressure, flow, or temperature is needed. A
feedback from the application is connected to the drive, providing the actual output value. The controller ensures that the output is
matching the reference provided by controlling the motor speed. The reference source and the feedback signals are converted and
scaled to the actual values controlled.
2.1.1.15.2 Speed Controller
The open-loop speed control provides accurate control of the motors rotational speed.
In open-loop mode (without external feedback signal of the speed), there is no need for external sensors, making installation and
commissioning very easy, and eliminating the risk of defective sensors.
2.1.1.15.3 Torque Controller
A built-in torque controller provides optimized control of torque and supports open-loop control.
2.1.2 IO Control and Readouts
Depending on the hardware configuration of the drive, digital and analog inputs, digital and analog outputs, and relay outputs are
available. The I/O can be configured and used to control the application from the drive.
All I/O can be used as remote I/O nodes, as they are all addressed by the fieldbus of the drive.
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