Honeywell Universal Digital Controller UDC 3300 Manual do Utilizador descarregar pdf (Página 287)

4/00 UDC 3300 Controller Product Manual 275

Step 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

GAIN

and

RESET TIME in Minutes

Repeat

% PROPORTIONAL BAND

and

RESET ACTION in Repeats

Minutes

Proportional (P) only

Use PD+MR Algorithm

(i.e. No Reset)

GAIN = Measured Gain x 0.5

RESET TIME = 50.00

(minimum reset)

RATE = 0

%PB = Measured PB x 2

RESET ACTION = 0.02

(repeats/minute)

RATE = 0

Proportional + Reset

(PI) (No Rate)

GAIN = Measured Gain x 0.5

RESET TIME = Measured Time

(M/R) 1.2

RATE = 0

%PB = Measured PB x 2.2

RESET ACTION =

1.2

(R/M) Measured Time

RATE = 0

Proportional + Reset + Rate

(PID)

GAIN = Measured Gain x 0.6

RESET TIME = Measured Time

RATE = Measured Time

%PB = Measured PB x 1.7

RESET ACTION =

Measured Time

RATE = Measured Time

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