Honeywell UDC 3300 manual Disabl Tune TUN+PV SP+PV, Accutune for Loop, SP Chang

Lower Display

Prompt

ACCUTUNE

Upper Display

Range of Setting

or Selection

DISABL

TUNE

SP

TUN+PV

SP+PV

Parameter

Definition

ACCUTUNE for Loop 1

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.

SETPOINT TUNING — This selection tunes on setpoint changes only. It employs time domain analysis to accelerate line out at any desired setpoint without prior initialization or process knowledge.

SP is the recommended start-up mode— to be used when no knowledge of the process tuning values is available. In the Start-up mode, and after enabling ACCUTUNE, the operator simply lines out the process variable in manual mode, selects the desired SP value and switches to automatic mode.

DEMAND TUNING PLUS PV ADAPTIVE TUNE— 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 1-1/2 process

cycles around setpoint before any process recognition and re-tuning can occur due to PV disturbances.

SETPOINT TUNING PLUS PV ADAPTIVE TUNE— This selection tunes on setpoint changes but also whenever a PV process disturbance of 0.3 % span or greater occurs. It will take 1-1/2 process cycles around setpoint before any process recognition and re-tuning can occur due to PV disturbances.

ACCUTUN2
	DISABL
	TUNE
	SP
	TUN+PV
	SP+PV
SP CHANG*	5 to 15 %

ACCUTUNE for Loop 2— Available only if configured for 2-Loop or Cascade control.

DISABLE ACCUTUNE— Disables the Accutune function for Loop 2.

DEMAND TUNING— Same as ACCUTUNE. SETPOINT TUNING— Same as ACCUTUNE.

DEMAND TUNING PLUS PV ADAPTIVE TUNE— Same

as ACCUTUNE.

SETPOINT TUNING PLUS PV ADAPTIVE TUNE— Same

as ACCUTUNE.

SETPOINT CHANGE LOOP 1— The minimum setpoint change on Loop 1 that will result in re-tuning must be configured between 5 % and 15 %; i.e., if the range is 0 to 2400 and 5 % is configured, re-tuning will occur if the setpoint change is 120 or larger.

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