Micromod Micro-DCI: 53MC5000 Multi-Loop Process Controller CUSTOMIZATION GUIDE - Manual (Page 41)

G11
PID - 3
NAME SYMBOL DATAPOINT
INPUTS
PROCESS VARIABLE PV3 C208
DEVIATION DV3 C229
RESET FEEDBACK RF3 C235
CONTROL TRACK
COMMAND 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 subroutine computes a control output signal based on the above listed inputs
and parameters. The result is available as a database parameter CO. When the
control track command is zero,the module output will track the reset feedback by
back calculating the integrator term. When CTC is 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 final control element. For standard PID controller
operation, reset feedback should equal OUT and control track command should
equal AUT.
MODULAR CONTROLLER CUSTOMIZATION GUIDE
2-34