32 UDC3200 Universal Digital Controller Operator Manual 04/08
3.5 Accutune Set Up Group
Function
Prompt
Lower Display
Selections or
Range of Setting
Upper Display
Parameter Definition
FUZZY FUZZY OVERSHOOT SUPPRESSION—Can be enabled or
disabled independently of whether Demand Tuning or SP Tuning is
enabled or disabled.
DISABLE
ENABLE
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 ACCUTUNE III
DISABLE
TUNE
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
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 %).
AUTO
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.
DUPLEX
This prompt
only appears
when a Duplex
Control
Algorithm has
been
configured
DISABLE
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).
AT ERROR
(Read Only)
ACCUTUNE ERROR STATUS—When an error is detected in the
Accutune process, an error prompt will appear.
NONE
NONE—No errors occurred during last Accutune procedure.
RUNNING
RUNNING—An Accutune process is still active checking process
gain, even though “T” is not lit. It does not affect keyboard
operation.
ABORT
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
SP2—LSP2 not configured or a Setpoint other than LSP1 or LSP2
is in use.
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