WEG CFW-11 Programming Manual page 52

General Information
NTC: It's a resistor whose resistance value in ohms decreases proportionally to the temperature increase; it is
used as a temperature sensor in power modules.
Keypad (HMI): Human-Machine Interface; It is the device that allows the control of the motor, the visualization
and the modification of the inverter parameters. It presents keys for commanding the motor, navigation keys
and a graphic LCD display.
MMF (Flash Memory Module): 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 type of connection in the perspective of the "Plug and Play" concept.
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PE: "Protective Earth".
RFI Filter: "Radio Frequency Interference Filter". It is a filter that avoids interference in the radiofrequency range.
PWM: "Pulse Width Modulation". It is a pulsing voltage that supplies the motor.
Switching Frequency: It is the inverter bridge IGBTs commutation frequency, specified normally in kHz.
General Enable: When activated, it accelerates the motor with the acceleration ramp provided Run/Stop=Run.
When deactivated, the PWM pulses are immediately blocked. It can be commanded through digital input
programmed for that function or via serial.
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 digital input programmed for that function or via serial. The HMI
keys and
= Run,
Heatsink: It is a metal part designed for dissipating the heat generated by the power semiconductors.
Amp, A: Ampere.
°C: Degrees Celsius.
AC: Alternating Current.
DC: Direct Current.
CFM: "Cubic Feet per Minute"; it is a flow measurement unit.
hp: "Horse Power" = 746 Watts (power measurement unit, normally used to indicate the mechanical power
of electric motors).
Hz: Hertz.
l/s: liters per second.
kg: kilogram = 1000 gram.
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work in a similar manner:
= Stop.