Danfoss iC7 Motion Series Application Manual page 16

Application Guide | iC7 Series Motion
Inching with Jogging Modes
2.2.6
Predefined speed settings are available for use during commissioning, maintenance, or service. The settings include Slow Down mode
(operating at decreased speed), Jogging mode (operating at a preset speed), and Override mode (this mode overrides any reference
settings).
Frequency Bypass
2.2.7
Specific motor frequencies can be bypassed during operation. The feature helps to minimize and avoid mechanical resonance of the
machine, limiting vibration and system noise.
Mains Dropout
2.2.8
If there is a mains dropout and the drive cannot continue operation, it is possible to select predefined corrective actions. These actions
include a trip, coasting, or performing a controlled ramp down.
Load Drooping
2.2.9
The load drooping function ensures that multiple motors, each controlled by a drive and connected to a common mechanical shaft,
share the load. The function is typically used in cranes, winches, or larger conveyor systems controlled by 2 or more motors.
Controllers
2.3
Speed Controller
2.3.1
A built-in speed PID controller provides accurate control of the rotational speed of the motor. The controller offers control in both open
and closed-loop configuration.
Open-loop mode does not require an external sensor for measuring the feedback signal. This allows easy installation and commissioning
and eliminates the risk of defective sensors.
In closed-loop mode, a speed sensor is added, offering highly accurate control.
The parameters of the speed controller can be optimized by the built-in auto tuning function.
Torque Controller
2.3.2
A built-in torque controller provides optimized control of torque. Typical use cases are in tension control for winches or extruders. The
drive offers both open-loop control where the current sensors provide the feedback and a closed-loop control with feedback provided
by an external torque sensor.
Position Controller
2.3.3
A built-in position controller provides accurate position control of linear or rotating movement. Position control is always closed loop,
based on a PID controller, but the position feedback can be:
The position measured by a physical device, for example an encoder
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The rotor position estimated by Motor Control, referred to as "sensorless position control"
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This position controller is the basis for the integrated motion control features like Positioning and Gear mode.
Motor Control Features
2.4
Motor Types
2.4.1
The drive supports standard available motors, such as:
Asynchronous motors
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Permanent magnet motors
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