Micromod Micro-DCI: 53IT5100A Indicator/Totalizer - Manual (Page 11)

rollover value. The dropout value specifies a minimum input value required to increment the run-
ning total.
All of the selectable entries for the Indicator/Totalizer are parameter entries to the database. The
database is subdivided into modules composed of datapoints that are accessed by the instruction
code as the instrument performs its functions. The database allows instrument functionality to be
refined to specific process applications, as display attributes can be altered, input signal charac-
teristics can be defined, each totalizer accumulated value can be flagged, and the instrument can
be configured to properly match Datalink network communications requirements. A datapoint loca-
tion is represented as an alphanumeric address, such as C103, which is the location to enter the
value for the ANI0 upper alarm limit that is displayed on the Quad Bar Graph or Dual Bar Graph
(Channels 1&2) displays. Datapoints are specified parenthetically in the illustration call-outs of
Section 3 where the displays are described in detail. There are also illustrated procedures pro-
vided in Section 3 that show how a datapoint is displayed and configured. Definitions for all of the
Indicator/Totalizer datapoints are provided in Section 4 and listed in alphanumeric order in Appen-
dix C.
External alarm buzzers can be activated with the contact outputs (CCO0 and CCO1 ). Capability
limits of each CCO are 50 mA maximum current flow when closed and 30 V dc maximum tolerance
voltage when open. Flagged conditions, such as Totalizer 0 (ANI0) rollover pulse activation, can
be specified as selectable entries in the CCO module of the database. Specific details for CCO da-
tabase selections are described in Table 4-6 of Section 4, and typical circuit layouts for the CCOs
are described in Appendix A.
Datalink is another independent serial communications connection for the Indicator/Totalizer. It
provides a permanent connection to an RS-485 multi-drop network through which a SUPERVISOR-
PC or other host computer can access the instrument and change configurable parameters. The
Datalink connection is made at TB1 of the rear terminal board, screw lugs 19 through 22.
53IT5100 Indicator/Totalizer
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