Micromod Micro-DCI: 53MC5000 Multi-Loop Process Controller Manuale Utente Scaricare il pdf (Pagina 74)

F-CIM 71

PID - 3

NOT REUSABLE

NAME SYMBOL DATAPOINT

INPUTS

n-1

DEVIATION DV3 C229

A [unused]

B RESET FEEDBACK RF3 C235

C CONTROL TRACK COM-

MAND

CTC3 L195

PARAMETERS PROPORTIONAL BAND PB3 C214

RESET TIME TR3 C215

RATE TIME TD3 C216

OUTPUT HIGH LIMIT OH3 C217

OUTPUT LOW LIMIT OL3 C218

MANUAL RESET MR3 C219

INSTRUMENT RANGE IR3 C223

FEED FORWARD FF3 C230

REVERSE SWITCH RSW3 L178

OUTPUTS

CONTROL OUTPUT CO3 C231

Description:

This module computes a control output signal based on the above listed inputs and parameters.

The result is simultaneously available as the module output S

and as a database parameter

CO. The A, B, and C inputs can be any L,B, C[S], or H type datapoint. When the

control track command input is less than one, the module output will track the reset

feedback input (B) by back calculating the integrator term. When (C) input is

greater than or equal to 1 the reset feedback is used by the integrator to calculate

the next output and should reflect the value (scaled 0-100%) of the value of the fi-

nal control element. For standard PID controller reset feedback, (B) should be OUT

and control track command should be AUT.

MODULAR CONTROLLER CUSTOMIZATION GUIDE

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Micromod Micro-DCI: 53MC5000 Multi-Loop Process Controller Manuale Utente Pagina 74