Honeywell UDC 3300 manual Using Two Sets of Tuning Constants

5.10 Using Two Sets of Tuning Constants

Introduction

Select two sets or gain scheduling

You can use two sets of tuning constants for single output types and

2-loop or cascade control, and choose the way they are to be switched. (Does not apply for Duplex control.)

The sets can be:

•keyboard selected,

•automatically switched when a predetermined process variable value is reached,

•automatically switched when a predetermined setpoint value is reached.

The following procedures show you how to:

•select two sets or gain scheduling,

•set the switch-over value,

•set tuning constant value for each set, and

•switch between two sets via the keyboard (without automatic switchover)

The procedure in Table 5-16 tells you how to select two sets or gain scheduling.

Table 5-16 Procedure for Selecting Two Sets of Tuning Constants

Step

1

2

Operation

Select Control Set Up group

Select

PID SETS function

Press

SET UP

FUNCTION

LOOP 1/2

or

		Action
until you see:
	Upper Display	Upper Display
	SET UP	SET UP
	Lower Display	Lower Display
	CONTROL	CONTROL2
	for Loop 1 or	for Loop 2
until you see:
	Upper Display	Available selections
		are listed below
	Lower Display
	PID SETS

1 ONLY—1 set of constants

2KEYBD— 2 sets, keyboard selectable

2 PVSW— 2 sets, auto switch at PV value 2 SPSW— 2 sets, auto switch at SP value GAIN S— Gain used in control algorithm calculations can be pre-entered into eight user-defined segments, with each segment applied over a user-defined PV range. Refer to Section 3 – Configuration under Tuning Set Up group to set Gain segment values and PV range values.

to select the type of PID SET.

168 UDC 3300 Controller Product Manual 4/00