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3.5 Accutune Set Up Group
Function
Selections or
Prompt
Range of Setting
Lower Display
Upper Display
FUZZY
DISABLE
ENABLE
ACCUTUNE
DISABLE
TUNE
DUPLEX
This prompt
only appears
MANUAL
when a Duplex
Control
Algorithm has
been
configured
AUTO
DISABLE
AT ERROR
(Read Only)
NONE
RUNNING
ABORT
SP2
32
FUZZY OVERSHOOT SUPPRESSION—Can be enabled or
disabled independently of whether Demand Tuning or SP Tuning is
enabled or disabled.
DISABLE—Disables Fuzzy Overshoot Suppression.
ENABLE—The instrument uses Fuzzy Logic to suppress or
minimize any overshoot that may occur when PV approaches SP. It
will not recalculate any new tuning parameters.
ACCUTUNE III
DISABLE —Disables the Accutune function.
DEMAND TUNING—If TUNE is selected, and tuning is initiated
through the operator interface or digital input (if configured), the
algorithm calculates new tuning parameters and enters them into
the tuning group. This tuning requires no process knowledge and
does not require line out for initialization.
DUPLEX ACCUTUNING III – These prompts only appear when a
duplex output type has been configured.
MANUAL – Tune manually using LSP 1 and LSP 2 values. LSP 1
is used to derive tuning parameters associated with HEAT (output
> 50 %). LSP 2 is used to derive tuning parameters associated
with COOL (output < 50 %).
AUTOMATIC – Tuning is performed automatically on both HEAT
and COOL sequentially. LSP 1 is used for HEAT tuning and LSP 2
is used for COOL tuning. To initiate tuning, either LSP 1 or LSP 2
must be in use.
DISABLE – The current SetPoint is used to derive a single set of
blended tuning parameters. This tuning is performed over the
range of the output limits similar to Simplex Tuning. The Tuning
Parameters derived are placed into both the HEAT and COOL tune
sets (PID 1 and PID 2).
ACCUTUNE ERROR STATUS—When an error is detected in the
Accutune process, an error prompt will appear.
NONE—No errors occurred during last Accutune procedure.
RUNNING—An Accutune process is still active checking process
gain, even though "T" is not lit. It does not affect keyboard
operation.
CURRENT ACCUTUNE PROCESS ABORTED—Caused by one
of the following conditions: changing to manual mode, digital input
detected, in heat region of output but a cool output was calculated,
or vice versa.
SP2—LSP2 not configured or a Setpoint other than LSP1 or LSP2
is in use.
UDC3200 Universal Digital Controller Operator Manual
Parameter Definition
04/08
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