Siemens SINAMICS PERFECT HARMONY GH180 Function Manual page 329

OR
OR is a logical Boolean function whose output is true if any of the inputs is true. In SOP notation,
OR is represented as "+".
Parameter
A parameter is one of four items found in the menu system. Parameters are system attributes
that have corresponding values that can be monitored or, in some cases, changed by the user.
Pick list
A pick list is one of four items found in the menu system. Pick lists are parameters that have
a finite list of pre-defined "values" from which to choose, rather than a value range used by
parameters.
PID
PID is an acronym for proportional + integral + derivative, a control scheme used to control
modulating equipment in such a way that the control output is based on (1) a proportional
amount of the error between the desired setpoint and the actual feedback value, (2) the
summation of this error over time, and (3) the change in error over time. Output contributions
from each of these three components are combined to create a single output response. The
amount of contribution from each component is programmable through gain parameters. By
optimizing these gain parameters, the operator can "tune" the PID control loop for maximum
efficiency, minimal overshoot, quick response time, and minimal cycling.
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.
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.
NXGpro Communication
Function Manual, AB, A5E33486415A
Glossary
329