Micromod Micro-DCI: 53MC5000 Multi-Loop Process Controller FLEXIBLE CONTROL STRATEGIES - Manual (Page 13)

2.4 ASSIGNING WORKSHEET VALUES
For single loop controllers the flexible control strategy wirelist datapoint range is from B100 to
B172. Two loop and four loop controllers go to B211 and B239 respectivley. This does not include
the standard parameter datapoints, e.g., mathematical constants K1-K12, etc., that also affect FCS
operation. Notice, in Figures 2-1 through 2-3, the output datapoints of the modules are the L-val-
ues (dark circles) and C-values (open circles) that get wired to the FCS input datapoints (dia-
monds) B100 to B239. For example, as shown in the symbolic illustration below, if the Emath A
module B119 numeric input (open diamond) is wired to ANI0 numeric output datapoint C020 (open
circle), then a 20 must be loaded into datapoint B119. The alpha character
C can not be loaded
into a B type datapoint, and it is not necessary. This is because it is a numeric input that requires
a numeric C-value, not a logical L-value (not L020); therefore, the 20 is assumed by the FCS exe-
cution code to be a C-value (C020). Because the Emath A module input datapoint B119 points
back to the ANI0 output C020, the connection is said to be
backward keyed. In fact, the entire
FCS worksheet is completed this way (there is no worksheet list of output datapoints that points for-
ward [forward keyed] to the FCS wirelist inputs).
An illustration of the worksheet entry for this Extended Math A module appears directly below the
symbolic illustration of the ANI0-8 and Emath A modules. Notice the value 20 that appears in bold
for the wirelist datapoint B119. After the entire worksheet is completed, the values are loaded into
their respective datapoints in the PCS. Procedures to enter data into the PCS are provided in the
53MC5000 Instruction Bulletin. The worksheet is provided in Appendix B for photocopying. It is
suggested that several copies be made of it to avoid corrupting the original. If one of the ten exist-
ing control strategies is to be modified, then it might be easier to first photocopy the prepared work-
sheet for that control strategy, which is provided in Appendix A. Changes could then be marked-up
on the photocopy before the values are loaded into the PCS. Although it is not necessary to create
a symbolic illustration before preparing the worksheet, Figures 2-1 through 2-3 can also be photo-
copied and the wired connections can be penciled-in before the worksheet is prepared.
FCS WORKSHEET
EXTENDED MATH A
ONE LOOP COMMENTS: Output datapoints for this module are C029, L099.
W/L DEFLT VALUE NAME
B119 255 20 A K12
C365
0
K11
C364
0
K10
C363
0
K9
C362
0
K8
C361
0 B120 254 B
B121 253 C K1
C354
0
K2
C355
0
K3
C356
0
K4
C357
0
K5
C358
0
K6
C359
0
K7
C360
0 B122 000 FC
FCS 53MC5000 Flexible Control Strategies
2–6
3-1TXT