United Security Products AVD-45c Manual Pagina 213

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1/03 UDC 6300 Process Controller Product Manual 199
5.20 Accutune
Introduction
There are several types of Accutune from which to choose:
(TUNE) Demand Tuning - Tuning is done on demand by:
- pressing the Lower Display
and keys simultaneously, or
- by selecting prompt “TUNE RUN” in the lower display, or
- via Digital Input.
(SP Only) Setpoint Tuning - SP Only tuning will continually adjust the
Gain or Proportional Band (P), Reset (I), and Rate (D) tuning constants
in response to setpoint changes.
(TUNE) Demand Tuning + PV Adapt - provides “TUNE” On
Demand tuning plus “PV” adaptive tuning whenever a PV process
disturbance of 0.3% span or greater occurs.
(SP Only) Setpoint Tuning+ PV Adapt - provides “SP Only” tuning
plus “PV” adaptive tuning whenever a PV process disturbance of 0.3%
span or greater occurs.
Configuration
To configure this item, refer to Section 3 - Configuration:
• Set Up Group “ACCUTUNE
• Function Prompt “ACCUTUNE” or “ACCUTUNE 2” depending
on
which loop you are tuning.
• Select “DISABLE”, “TUNE”, “SP Only”, “TUNE + PV”, or
SP Only + PV. USE( or )
If SP Only” Selected:
- Enter the Setpoint Change Value, Function Prompt “SP CHANG(2)”
- Verify or change the Process Gain Value, Function Prompt
”KPG(2)”
- Verify Criteria, Function Prompt “CRITERIA(2)”
Two loop and
cascade operation
Accutune II can be used on either or both loops. However, while one loop
is operating SP Only tuneing, the configuration of either loop cannot be
changed.
When one loop is operating by PV adaptine tuning, the other loop can
have its configuration changed.
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