Internal Current Control In Vvc+ Mode; Local (Hand On) And Remote (Auto On) Control - Danfoss FC 300 Design Manual

FC 300 Design Guide

Internal Current Control in VVC+ Mode

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The adjustable frequency drive features an integral current limit control which is activated when the motor
current, and thus the torque, is higher than the torque limits set in par. 4-16, 4-17 and 4-18.
When the adjustable frequency drive is at the current limit during motor operation or regenerative
operation, the adjustable frequency drive will try to get below the preset torque limits as
quickly as possible without losing control of the motor.

Local (Hand On) and Remote (Auto On) Control

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The adjustable frequency drive can be operated manually via the local control panel (LCP)
or remotely via analog and digital inputs and serial bus.
If allowed in par. 0-40, 0-41, 0-42, and 0-43, it is possible to start and stop the adjustable frequency
drive via the LCP using the [Hand ON] and [Off] keys. Alarms can be reset via the [RESET] key.
After pressing the [Hand On] key, the adjustable frequency drive goes into Hand mode and follows
(as default) the local reference that can be set using the arrow key on the LCP.
After pressing the [Auto On] key, the adjustable
frequency drive goes into Auto mode and follows
(as default) the remote reference. In this mode,
it is possible to control the adjustable frequency
drive via the digital inputs and various serial
interfaces (RS-485, USB, or an optional serial
communication bus). See more about starting,
stopping, changing ramps and parameter set-ups,
etc. in par. group 5-1* (digital inputs) or par.
group 8-5* (serial communication).
Active Reference and Configuration Mode
The active reference can be either the local reference or the remote reference.
In par. 3-13 Reference Site the local reference can be permanently selected by selecting Local [2].
To permanently select the remote reference, select Remote [1]. By selecting Linked to Hand/Auto [0]
(default), the reference site will depend on which mode is active. (Hand Mode or Auto Mode).
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Introduction to FC 300
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