Micromod Micro-DCI: 53SL5100B Single Loop Controller Manual de usuario descargar pdf (Pagina 82)

53SL5100B Single-Loop Controller

INSTRUCTION MANUAL

11.3 EASY-TUNE Parameters

All pertinent input parameters to the EASY-TUNE algorithm are obtained from Controller Module Mode 0,

which must first be configured. The parameters that must be configured before initiating the EASY-TUNE

sequence (B008 = 1) are items 1, 3, 5 through 10, in Table 11-1.

Table 11-1. EASY-TUNE Parameters

Item Datapoints Description Default

L520

C385

C386

C387

C388

C389

C390

Enable Tuning Parameter Limits

0 - no limits checked, 1 - limits below apply

lowest % PB

highest % PB

lowest T

(minutes)

highest T

(minutes)

lowest T

(minutes)

highest TD (minutes)

500

2 L521 Abort EASY-TUNE Switch 0 - no effect, 1 - EASY-TUNE is aborted 0

L522 Automatic Tuning Parameter 1 - upon successful completion of the

EASY-TUNE sequence, new tuning parameters will be entered. 0 - new

tuning parameters will not be entered but available for review.

4 B008 Enable EASY-TUNE 0

5 B385 Control Module Selector (leave at 0) 0

6 B386 PID Control Mode 1 - P, 2 - PI, 3 - PID, 4 - PD, 5 -I 0

C378 Excursion Limit for Preliminary Step Disturbance (%) The step size

chosen for C381 will cause a PV change which depends on the

process gain as well as C381 itself. C378 should be set to

approximately 1/4 of that expected change. (See C381 below.)

C379 Limiting Settling Time (seconds) Set to maximum time allowed during

B387 = 1 or 2. (See Table 11-2 and Figure 11-1.)

C380 Maximum Allowable Excursion of PV in EASY-TUNE (%) Setting C380

will prevent excessive change in PV.

C381 Step Size Change in Controller Output (± %) Set large enough to cause

significant but allowable PV changes. (See C378 above.)

C382

C383

C384

Modifiers to Tuning Criteria (see Section 11.5.)

Time Constant modifier

Process Gain modifier

Dead-Time modifier

C391

C392

C393

C394

C395

C396

EASY-TUNE Results (display only):

Time Constant (seconds)

Process Gain

Dead-Time (seconds)

% PB

(minutes)

1 2 ... 77 78 79 80 81 82 83 84 85 86 87 ... 114 115

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Micromod Micro-DCI: 53SL5100B Single Loop Controller Manual de usuario Pagina 82

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