National Instruments PID Control Toolkit 371685C-01 User Manual page 36

R
ramp
reentrant execution
S
s
setpoint (SP)
span
T
time constant (T)
trapezoidal integration
V
V
W
windup area
© National Instruments Corporation
The total (transient plus steady-state) time response resulting from a sudden
increase in the rate of change from zero to some finite value of input
stimulus.
Mode in which calls to multiple instances of a function can execute in
parallel with distinct and separate data storage.
Seconds.
An input variable that sets the desired value of the controlled process
variable.
The algebraic difference between the upper and lower range values.
In process instrumentation, the value T (in minutes) in an exponential
response term, A exp (–t/T), or in one of the transform factors, such as
1+sT.
A numerical integration in which the current value and the previous value
are used to calculate the addition of the current value to the integral value.
Volts.
The time during which the controller output is saturated at the maximum or
minimum value. The integral action of a simple PID controller continues to
increase (wind up) while the controller is in the windup area.
G-5 LabWindows/CVI PID Control Toolkit User Manual
Glossary