Emerson Tescom ER5000 Series User Manual

ER5000 —
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Glossary of Terms
Integral
The component of a controller’s response that is based on
accumulated error within the system. Continues to accumulate as
long as there is a non-zero Error and retains its value until errors
are generated in the opposite direction. Accelerates the effect of
Proportional. Often referred to as “reset,” because its continually
increasing value effectively “resets” the value of Setpoint within
the controller’s computations above or below its actual level.
This allows PID controllers to eliminate Offset. The retained
Integral value, also known as Integral Windup, must be carefully
controlled to prevent response lag.
Integral Deadband
Stop-band lter that deactivates Integral within a set percentage
range around Setpoint. Prevents small, transient errors from
accumulating to a level that activates the controller. Accessed
through The Tuning Tab in the ERTune™ program.
Integral Windup
Amount of accumulated value that is retained by Integral after error
has been corrected. Excess windup can cause the controller to lag in
response to new Errors. Proper Tuning prevents windup by setting
limits on accumulated value through the Integral Limits.
Integral Limits
Pair of lters which limit the amount of Integral Windup that can
accumulate during Error correction. Maximum limit is set for
positive errors (Setpoint minus Feedback is positive). Minimum
limit is set for negative errors (setpoint minus feedback is
negative). Accessed through The Tuning Tab in the ERTune™
program. Allow for high Integral settings without unwanted
effects. Generally set to the smallest value necessary to
eliminate Offset.
Node Address
Virtual address of the ER5000 within a network. Each controller
is assigned a default address of 250 at the factory. When multiple
ER5000s are in a Daisychain within the same RS485 network,
each controller must be assigned a unique address so that the PC
can locate and communicate independently with each controller.
The Node Address can be changed using The Congure Tab in the
ERTune™ program.
Noise
Short, transient changes to the system that are generally too
small to require activation of the PID Controller. A Derivative
setting that is too high may make the controller overly reactive

Emerson Tescom ER5000 Series Specifications

General

Brand	Emerson
Model	Tescom ER5000 Series
Category	Controller
Language	English