Honeywell UDC 3300 manual Introduction Accutune group prompts

4.5 Accutune Set Up Group

Introduction

Accutune group prompts

Accutune continuously adjusts the PID parameters in response to process variable disturbances and/or setpoint changes. Also, it can be used during start-up without prior initialization or process knowledge.

Accutune offers the following selections:

•FUZZY—Fuzzy Overshoot Suppression

•TUNE—Demand Tuning (operates with SP Ramp or SP Program), or

•SP*—Setpoint Tuning, or

•TUN+PV*—Demand Tuning plus PV Adaptive Tune, or

•SP+PV*—Setpoint Tuning plus PV Adaptive Tune

Descriptions of their functions are listed with each selection in Table 4-4.

*Not available on Basic Model DC330B

ATTENTION Selecting Gain Scheduling in the Control or Control 2 Set Up groups automatically disables Accutune for that group.

Table 4-4 lists all the function prompts in the Accutune Set Up group and their definitions.

Table 4-4 Accutune Group Definitions

Lower Display

Prompt

FUZZY

Upper Display

Range of Setting

or Selection

DISABL

ENABLE

ENABL2

ENAB12

Parameter

Definition

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 ON LOOP 1 ONLY— 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.

ENABLE ON LOOP 2 ONLY— Same as ENABLE except for Loop 2 only.

ENABLE ON BOTH LOOPS— Same as ENABLE except for both Loops.

88 UDC 3300 Process Controller Product Manual 4/00