Glossary
Glossary-3
Rated Full Load Current. Armature current in amperes.
Retentive. Parameter value is stored in the drive even when power is off. To save
changes to the values, a Memory Save must be performed before removing power.
RPM. Revolutions per Minute. The number of times per minute the shaft of the motor
(machine) rotates.
Service Factor (SF). When used on a motor nameplate, a number that indicates how
much above the nameplate rating a motor can be loaded without causing serious
degradation. For example, a 1.15 SF can produce 15% greater torque than a 1.0 SF
rating of the same motor.
Tachometer. Normally used as a rotation sensing device. Tachometers are typically
attached to the output shaft of a motor requiring close speed regulation. The
tachometer feeds its signal to a control loop, which adjusts its input to the motor
accordingly.
Top Speed. The highest speed a drive can achieve. Top speed equals base speed
when there is no field weakening.
Torque. Turning force delivered by a motor or gearmotor shaft, usually expressed in
pounds-feet or newton-meters:
Tunable. Input parameter whose value can be modified at any time (when the drive is
stopped, running, or jogging).
lb-ft HP
5250
RPM
-------------
×
Full Load Torque
==
Nm P(kW)
9550
RPM
-------------
×
Full Load Torque
==
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