Honeywell UDC 3300 manual Manual Tuning Formulas Units, To Reduce Overshoot

Step

10

Action

Enter the values of GAIN (or PB), RATE, and RESET in minutes (or repeats per minute) into the UDC 3300 controller and verify that the PV response is adequate.

Make additional trimming adjustments, if necessary, to fine tune the controller per the guidelines shown below:

TO REDUCE OVERSHOOT

Less Gain (more PB) perhaps a longer Rate time.

TO INCREASE OVERSHOOT OR INCREASE SPEED OR RESPONSE More Gain (less PB), perhaps shorter Rate time.

Manual tuning formulas Table 11-2 lists the formulas used in the procedure listed in Table 11-1.

Table 11-2 Manual Tuning Formulas

Units

Proportional (P) only

Use PD+MR Algorithm (i.e. No Reset)

Proportional + Reset (PI) (No Rate)

Proportional + Reset + Rate (PID)

GAIN and

RESET TIME in Minutes Repeat

GAIN = Measured Gain x 0.5 RESET TIME = 50.00 (minimum reset)

RATE = 0

GAIN = Measured Gain x 0.5

RESET TIME = Measured Time

(M/R) 1.2

RATE = 0

GAIN = Measured Gain x 0.6

RESET TIME = Measured Time

2

RATE = Measured Time

8

%PROPORTIONAL BAND and

RESET ACTION in	Repeats
	Minutes

%PB = Measured PB x 2 RESET ACTION = 0.02 (repeats/minute)

RATE = 0

%PB = Measured PB x 2.2

RESET ACTION =		1.2
(R/M)	Measured Time

RATE = 0

%PB = Measured PB x 1.7

RESET ACTION = 2

Measured Time

RATE = Measured Time

8

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