WEG CFW-11 User Manual page 12

General Instructions
PTC: resistor which resistance value in ohms increases proportionally to the temperature increase; used as a
temperature sensor in electrical motors.
NTC: resistor which resistance value in ohms decreases proportionally to the temperature increase; used as a
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; it's also known as keypad. The CFW-11 HMI presents keys for
commanding the motor, navigation keys and a graphic LCD display.
FLASH Memory: non-volatile memory that can be electronically written and erased.
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RAM Memory: Random Access Memory (volatile).
USB: Universal Serial Bus; is a serial bus standard that allows devices to be connected using the "Plug and
Play" concept.
General Enable: when activated, this function accelerates the motor via acceleration ramp set in the inverter.
When deactivated, this function immediately blocks the PWM pulses. The general enable function may be
controlled through a digital input set to this function or via serial communication.
Start/Stop: when enabled in the inverter (Start), this function accelerates the motor via acceleration ramp up
to the speed reference. When disabled (Stop), this function decelerates the motor via deceleration ramp up to
the complete motor stop; at this point, the PWM pulses are blocked. The Start/Stop function may be controlled
through a digital input set for this function or via serial communication. The operator keys Start, and Stop
of the keypad work in a similar way.
STO: Safe Torque Off; functional safety function available as an option in CFW-11 inverter series. When STO
function is enabled the inverter guarantees that there is no movement of the motor shaft. It's also called safety
stop function in CFW-11 documentation.
PLC: Programmable Logic Controller.
TBD: value to be defined.
AC: Alternated Current.
DC: Direct Current.
Amp, A: Ampères.
°C: celsius degree.
CFM: Cubic Feet per Minute; unit of flow.
cm: centimeter.
°F: Fahrenheit degree.
CFW-11 | 2-3