Danfoss VLT AutomationDrive FC 300 Design Manual page 11

FC 300 Design Guide
Brake Resistor
The brake resistor is a module capable of absorbing the brake power generated in regenerative
braking. This regenerative braking power increases the intermediate circuit voltage and a brake
chopper ensures that the power is transmitted to the brake resistor.
CT Characteristics
Constant torque characteristics used for all applications such as conveyor belts,
displacement pumps and cranes.
Digital Inputs
The digital inputs can be used for controlling various functions of the frequency converter.
Digital Outputs
The drive features two Solid State outputs that can supply a 24 V DC (max. 40 mA) signal.
DSP
Digital Signal Processor.
Relay Outputs:
The FC 301 drive features one programmable Relay Output.
The FC 302 drive features two programmable Relay Outputs.
ETR
Electronic Thermal Relay is a thermal load calculation based on present load and time.
Its purpose is to estimate the motor temperature.
®
Hiperface
Hiperface ® is a registered trademark by Stegmann.
Initialising
If initialising is carried out (par. 14-22), the frequency converter returns to the default setting.
Intermittent Duty Cycle
An intermittent duty rating refers to a sequence of duty cycles. Each cycle consists of an on-load and
an off-load period. The operation can be either periodic duty or none-periodic duty.
LCP
The Local Control Panel (LCP) makes up a complete interface for control and programming of the FC
300 Series. The control panel is detachable and can be installed up to 3 metres from the frequency
converter, i.e. in a front panel by means of the installation kit option.
lsb
Least significant bit.
MCM
Short for Mille Circular Mil, an American measuring unit for cable cross-section. 1 MCM ≡ 0.5067 mm
msb
Most significant bit.
On-line/Off-line Parameters
Changes to on-line parameters are activated immediately after the data value is changed. Changes
to off-line parameters are not activated until you enter [OK] on the LCP.
Process PID
The PID regulator maintains the desired speed, pressure, temperature, etc. by adjusting
the output frequency to match the varying load.
How to Read this Design Guide
MG.33.B4.02 - VLT is a registered Danfoss trademark
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