FC 300 Design Guide
Introduction to FC 300
" Internal Current Control in VVC+ Mode
The a d justable frequency drive features an integral current li mit control which is activated wh en 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 g et bel ow the preset torque limits as
quickly as possible without losing control of the motor.
" Local (Hand On) and Remote (Auto On) Control
The adjustable frequency drive can be operated manually via the local control panel (LCP)
or remotely via analog and digital inputs and seria l bus.
If allowed in par. 0-40, 0-41, 0-42, and 0-43, it is possib le to sta rt and st op 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 mo d e and follow s
(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 p arameter set-ups,
etc. in par. group 5-1* (digital inputs) or par.
group 8-5* (serial communication).
130BP046.10
Active Reference a nd Configuration Mode
The active reference can be either the local reference or t he 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).
22
MG.33.B6.22 - VLT is a registered Danfoss trademark
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