Danfoss VLT AutomationDrive FC 300 Design Manual page 10

1. How to Read this Design Guide
Pulse Input/Incremental Encoder
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An external, digital pulse transmitter used for feeding back information on motor speed. The en-
coder is used in applications where great accuracy in speed control is required.
RCD
Residual Current Device.
Set-up
You can save parameter settings in four Set-ups. Change between the four parameter Set-ups
and edit one Set-up, while another Set-up is active.
SFAVM
Switching pattern called Stator Flux oriented Asynchronous Vector Modulation (par. 14-00).
Slip Compensation
The frequency converter compensates for the motor slip by giving the frequency a supplement
that follows the measured motor load keeping the motor speed almost constant..
Smart Logic Control (SLC)
The SLC is a sequence of user defined actions executed when the associated user defined events
are evaluated as true by the SLC. (Parameter group 13-xx).
FC Standard Bus
Includes RS 485 bus with FC protocol or MC protocol. See parameter 8-30.
Thermistor:
A temperature-dependent resistor placed where the temperature is to be monitored (frequency
converter or motor).
Trip
A state entered in fault situations, e.g. if the frequency converter is subject to an over-temperature
or when the frequency converter is protecting the motor, process or mechanism. Restart is pre-
vented until the cause of the fault has disappeared and the trip state is cancelled by activating
reset or, in some cases, by being programmed to reset automatically. Trip may not be used for
personal safety.
Trip Locked
A state entered in fault situations when the frequency converter is protecting itself and requiring
physical intervention, e.g. if the frequency converter is subject to a short circuit on the output. A
locked trip can only be cancelled by cutting off mains, removing the cause of the fault, and re-
connecting the frequency converter. Restart is prevented until the trip state is cancelled by
activating reset or, in some cases, by being programmed to reset automatically. Trip may not be
used for personal safety.
VT Characteristics
Variable torque characteristics used for pumps and fans.
VVCplus
If compared with standard voltage/frequency ratio control, Voltage Vector Control (VVC
proves the dynamics and the stability, both when the speed reference is changed and in relation
to the load torque.
60° AVM
Switching pattern called 60°Asynchronous Vector Modulation (par. 14-00).
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MG.33.B9.02 - VLT ® is a registered Danfoss trademark
FC 300 Design Guide
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