Glossary
Product User Manual
192 Operating Instructions, Version AE 12/2009, A5E01454341C
Qualified user
A qualified user is a properly trained individual who is familiar with the construction and
operation of the equipment and the hazards involved.
Quick menu
Quick menu is a feature of the menu system that allows the operator to directly access any
of the menus or parameters, rather than scrolling through menus to the appropriate item.
This feature uses the [Shift] button in conjunction with the right arrow. The user is prompted
to enter the four digit ID number associated with the desired menu or parameter.
RAM
RAM is an acronym for Random Access Memory, a temporary storage area for drive
information. The information in RAM is lost when power is no longer supplied to it. Therefore,
it is referred to as volatile memory.
Regeneration
Regeneration is the characteristic of an AC motor to act as a generator when the rotor’s
mechanical frequency is greater than the applied electrical frequency.
Relay
A relay is an electrically controlled device that causes electrical contacts to change their
status. Open contacts will close and closed contacts will open when rated voltage is applied
to the coil of a relay.
RS232C
RS232C is a serial communications standard of the Electronics Industries Association (EIA).
Setpoint
Setpoint is the desired or optimal speed of the VFD to maintain process levels (speed
command).
Slip
Slip is the difference between the stator electrical frequency of the motor and the rotor
mechanical frequency of the motor, normalized to the stator frequency as shown in the
following equation:
Slip =ω S - ω R ω S
Slip compensation
Slip compensation is a method of increasing the speed reference to the speed regulator
circuit (based on the motor torque) to maintain motor speed as the load on the motor
changes. The slip compensation circuit increases the frequency at which the inverter section
To Next Page
Loading...