WEG CFW501 V1.8X Programming Manual page 32

General Information
PTC: resistor whose resistance value in ohms increases proportionally to the temperature; it is used as a temperature
sensor in motors.
NTC: resistor whose resistance value in ohms decreases proportionally to the increase of the temperature; it is
used as a temperature sensor in power packs.
HMI: "Human-Machine Interface"; device which allows controlling the motor, viewing and changing the inverter
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parameters. It features keys to control the motor, navigation keys and graphic LCD display.
PE: protective earth.
PWM: pulse Width Modulation - modulation by pulse width; pulsed voltage that supplies the motor.
Switching frequency: commutating frequency of the inverter bridge IGBTs, normally expressed in kHz.
General Enable: when activated, it accelerates the motor by acceleration ramp and Run/Stop=Run. When disabled,
the PWM pulses will be immediately blocked. It may be controlled by digital input set for this function or via serial.
Run/Stop: inverter function which, when activated (run), accelerates the motor by acceleration ramp up to the
reference speed and, when deactivated (stop), decelerates the motor by deceleration ramp. It may be controlled
by digital input set for this function or via serial.
Heatsink: metal part designed to dissipate the heat produced by power semiconductors.
Amp, A: ampere.
°C: celsius degrees.
°F: fahrenheit degree.
CA: alternate current.
DC: direct current.
CV: cavalo-vapor = 736 Watts (Brazilian unit of measurement of power, normally used to indicate mechanical
power of electric motors).
hp: horse power = 746 Watts (unit of measurement of power, normally used to indicate mechanical power of
electric motors).
Fmin: minimum frequency or speed (P0133).
Fmáx: maximum frequency or speed (P0134).
DIx: digital input "x".
AIx: analog input "x".
AOx: analog output "x".
DOx: digital output "x".
Io: output current.
Iu: current on phase u (RMS).
Iv: current on phase v (RMS).
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