Danfoss FC 300 Design Manual page 8

1 How to Read this Design Guide
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VLT
The efficiency of the adjustable frequency drive is defined as the ratio between the power output and the power input.
1
Start-disable command
A stop command belonging to the group 1 control commands - see this group.
Stop command
See Control commands.
References:
Analog Reference
An analog signal applied to input 53 or 54. The signal can be either Voltage 0–10 V (FC 301 and FC 302) or -10–+10 V (FC 302) Current signal 0–20 mA
or 4–20 mA
Binary Reference
A signal applied to the serial communication port (RS 485 term 68 – 69).
Preset Reference
A defined preset reference to be set from -100% to +100% of the reference range. Selection of eight preset references via the digital terminals.
Pulse Reference
A pulse reference applied to term 29 or 33, selected by par 5-13 or 5-15 [32]. Scaling in par group 5-5*.
Ref
MAX
Determines the relationship between the reference input at 100% full scale value (typically 10 V, 20 mA) and the resulting reference. The maximum
reference value set in par. 3-03
Ref
MIN
Determines the relationship between the reference input at 0% value (typically 0 V, 0 mA, 4 mA) and the resulting reference. The minimum reference
value set in par. 3-02 Minimum Reference
Miscellaneous:
Analog Inputs
The analog inputs are used for controlling various functions of the adjustable frequency drive.
There are two types of analog inputs:
Current input, 0–20 mA and 4–20 mA
Voltage input, 0–10 V DC (AutomationDrive FC 301)
Voltage input, -10–+10 V DC (AutomationDrive FC 302).
Analog Outputs
The analog outputs can supply a signal of 0–20 mA, 4–20 mA.
Automatic Motor Adaptation, AMA
AMA algorithm determines the electrical parameters for the connected motor at standstill.
Brake Resistor
The brake resistor is a module capable of absorbing the braking energy generated in regenerative braking. This regenerative braking energy 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 adjustable frequency drive functions.
Digital Outputs
The adjustable frequency 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.
1-4
Maximum Reference
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MG.33.BC.22 - VLT ® is a registered Danfoss trademark
FC 300 Design Guide