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1/03 UDC 6300 Process Controller Product Manual 79
4.5 Accutune Set Up Group
Introduction
Accutune offers the following selections:
• (FUZZY) Fuzzy Overshoot Suppression
• (TUNE)Demand Tuning, or
• (SP Only) Setpoint Tuning, or
• (TUNE+PV) Demand Tuning + PV Adaptive Tune
• (SP+PV) Setpoint Tuning + PV Adaptive Tune
Descriptions of their functions are listed with each selection in Table 4-4.
ATTENTION
Selecting "Gain Scheduling" in the "CONTROL" or
"CONTROL 2" Set Up groups automatically disables Accutune for that
group.
Accutune group
prompts
Table 4-4 lists all the function prompts in the Accutune setup group and
their definitions.
Table 4-4 Accutune Group Definitions
Lower Display
Prompt
Upper Display
Range of Setting
or Selection
Parameter
Definition
FUZZY
DISABL
ENABLE
FUZZY OVERSHOOT SUPPRESSION - can be
enabled or disabled independently of whether
Demand tuning or SP tuning is enabled or disabled.
DISABLE- Disable Fuzzy Overshoot Suppression
ENABLE - The UDC 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
DISABL
TUNE
SP Only
TUNE+PV
SP Only + PV
(SP Only and SP+PV do
not operate with TPSC
Algorithm)
ACCUTUNE
DISABLE – Disables the Accutune function.
TUNE - 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.
SETPOINT ONLY This selection tunes on setpoint
changes only. It employs time domain analysis to
accelerate line out at any desired setpoint without
prior process knowledge.
TUNE + PV - This selection provides “TUNE” On
Demand tuning Plus PV adaptive tuning whenever a
PV process disturbance of 0.3% span or greater
occurs. It will take 1 and 1/2 process cycles around
setpoint befor any process recognition and re-tuning
can occur due to PV disturbances.
SP + PV - This selection tunes on setpoint changes
but also whenever a PV process disturbance of
0.3% span or greater occurs. It will take 1 and 1/2
process cycles around setpoint befor any process
recognition and re-tuning can occur due to PV
disturbances.
Table 4-4 continued on next page
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