WEG CFW-11 User Manual - page 13
General Information
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CFW-11 | 2-3
Heatsink: it is a metal part designed for dissipating the heat generated by the power semiconductors.
PE: Protective Ground.
Varistor:
Metal Oxide Varistor.
RFI Filter: "Radio Frequency Interference filter". A filter that avoids interference in the radiofrequency range.
PTC: it is a resistor, whose resistance value in ohms increases proportionally to the temperature increase, being
used as temperature sensor in motors.
NTC: it is a resistor, whose resistance value in ohms decreases proportionally to the temperature increase, being
used as temperature sensor in power modules.
HMI: "Human-Machine Interface" it is the device that allows the control of the motor, the visualization and the
modification of the inverter parameters. The CFW-11 HMI presents keys for commanding the motor, navigation
keys and a graphic LCD display.
Flash Memory: it is the nonvolatile memory that can be electrically written and erased.
RAM Memory: Random Access Memory (volatile).
USB: "Universal Serial Bus"; it is a serial bus standard that allows devices to be connected using the "Plug and
Play" concept.
General Enable: when activated, it accelerates the motor via acceleration ramp. When deactivated, this
function immediately blocks the PWM pulses. The general enable function can be controlled through a digital
input programmed for this function or via serial communication.
Run/Stop: Inverter function that when activated (Run) accelerates the motor with the acceleration ramp
until reaching the speed reference, and when deactivated (Stop) decelerates the motor with the deceleration
ramp down to stop. It can be commanded through a digital input programmed for that function or via serial
communication. The HMI keys
(Run) and
(Stop) work in a similar manner.
STO: safety function available as an option in the line of CFW-11 inverters.
When the STO function is enabled, the inverter ensures that no motion of the motor shaft will occur. It is also
referred to as Safety Stop in the documentation of the CFW-11.
PLC: Programmable Logic Controller.
TBD: value to be defined.
AC: Alternating Current.
DC: Direct Current.
Amp, A: ampères.