Micromod Micro-DCI: 53MC5000 Multi-Loop Process Controller CUSTOMIZATION GUIDE - Manual (Page 74)

F-CIM 71
PID - 3
NOT REUSABLE
NAME SYMBOL DATAPOINT
INPUTS
S 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
S n 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
n
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
3-22