Micromod Micro-DCI: 53MC5000 Multi-Loop Process Controller Manuel d'utilisateur télécharger pdf (Page 92)

A.1.1 CS1 - SINGLE-LOOP PID CONTROLLER

The PID controller is designed to fulfill the requirements of a majority of process applications. It is

used in conjunction with other devices in a standard feedback control loop to automatically control

a process variable (PV) at a predetermined setpoint (SP). The proportional, integral, and deriva-

tive (PID) terms can be activated as needed. The control scheme is shown in block diagram form

in Figure A–1. Also provided is Table A–1, which is a worksheet that shows the CS1 wirelist con-

nections; wirelist datapoints not connected are left at default. Table A-1 is partitioned by FCS mod-

ule type applicable to CS1 (those modules illustrated in Figure 2-1). The datapoint parameters for

each module are shown with their default values.

The process variable input and the control signal output are the only essential signals in this con-

figuration. The other assigned functions do not have to be configured if they are not required. The

span of the feed forward (FF) input should be set to 0.0 if FF is not required.

The following I/O assignments result from loading CS1:

ANI0 Process Variable

ANI1 Remote Setpoint

ANI2 Additive Feed Forward Input

ANI3 Tracking Input

ANO0 Control Output

ANO1 Retransmitted PV

CCI0 Force Output Tracking (Open Contact)

CCI1 Remote Setpoint Enable (Closed Contact)

CCO0 Process Alarm 1

CCO1 Process Alarm 2

FCS 53MC5000 Flexible Control Strategies

A-2

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Micromod Micro-DCI: 53MC5000 Multi-Loop Process Controller Manuel d'utilisateur Page 92