Micromod Micro-DCI: 53IT5100B Micro-DCI 4-Channel Indicator Totalizer - Manual (Page 9)

53IT5100B Indicator/Totalizer
INSTRUCTION MANUAL
Setup of the 53IT5100B can be done using the buttons on the horizontal and vertical keypads. It can also be
done via the MicroTools configuration software package, Directly beneath the horizontal keypad and
concealed behind the front panel pull-down door is the RS-232 Configuration Port which accept the
configuration cable that provides interface between the instrument and MicroTools running on a personal
computer. The configuration functions within MicroTools are limited to loaded functions of the 53IT5100B
indicator/totalizer described in this manual.
The internal power supply provides power to the main board and output power for transmitters (24-26 V dc,
80 mA total available output for instrument and transmitters).
A simplified input/output diagram of the Indicator/Totalizer is provided in the upper left corner of
Figure 1-2. As illustrated in the figure, the instrument can accept four Analog Inputs (ANI0-3) which are
digitized as operands for firmware interpretation and execution (totalization). Each ANI has a square root
extractor and can accept linear or squared signals of 0-20 mA, 0-5 V, 4-20 mA, or 1-5 V. Any one of the four
analog inputs can be selected as the Analog Output (ANO0).
There are two contact inputs (CCI0 and CCI1 ) that have a closed recognition level of 1 V dc and open
recognition level of 4-24 V dc. Each CCI indicates an alarm state, for example, a CCI can have a closed
recognition level when a secondary pump is activated to support the primary pump in maintaining a proper
tank level.
The totalizers provide a running total of each ANI input. The totalizers are incremented in ascending order
every 0.05 seconds, but all four totalizers are refreshed on the display every second. Each ANI value can be
independently adjusted by a scaling factor before being summed to the running total. The totalizer measured
units, therefore, can differ from the process activity measured units as determined by the scaling factor
entries for each channel. Also available as selectable totalizer entries are rollover and dropout values. The
rollover value specifies a maximum positive value that causes the totalizer accumulator to reset to zero when
the actual total reaches this value. An output pulse is strobed to a 1 for one scan each time the actual total
reaches the rollover value. The dropout value specifies a minimum input value required to increment the
running 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 characteristics 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 location 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
provided 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 Appendix 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 database 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 host computer can access the
instrument. The Datalink connection is made at TB1 of the rear terminal board, screw lugs 19 through 22.
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