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.
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 C ycle
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 non-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.
msb
Most significant bit.
MCM
Short for Mille Circular Mil, an American measuring unit for cable cross-section. 1 MCM = 0.5067
mm
2
.
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 out-
put frequency to match the varying load.
Pulse Input/Incremental Encoder
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.
FC 300 Programming Guide 1. Introduction
MG.33.M2.02 - VLT
®
is a registered Danfoss trademark
7
1
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