Micromod Micro-DCI: 53MC5000 Multi-Loop Process Controller Instruction Manual - Manual (Page 115)

The display handler may be configured manually by entering the appropriate values into datapoints
of the System Module (see Section 5, Table 5-15). The datapoints are Number of Groups (B017),
Number of Displays per Group (B018), and Display List (B021 through B084).
Displays are updated at intervals determined by the Scan Index (B003) and Background Scan Index
(B006), which are configurable parameters. (The display elements themselves are always refreshed
80 times a second independent of the updating intervals.)
A horn overlay that flashes in reverse video is superimposed at the top of any display whenever a
controller monitored process variable alarm condition occurs. If not in FIX 0 (company logo) or FIX
97 (Display Test), the top line of the display is overwritten with the contents of datapoint A009;
datapoint L065 (Horn) must be set to 1 and datapoint L063 (No A Line) must be cleared to 0 for this
to happen. An alarm overlay also appears on point displays just below the horn overlay. The alarm
overlay flashes in reverse video the type of alarm detected (e.g., High, Low, HiHi, etc.). On multiple
point display bar graph presentations, the alarmed state bar graph vertical axis flashes on and off. (If
the entire selected display flashes from normal to reversed video, it indicates a watchdog timer
condition occurred as a result of a processor failure in the controller.)
The controller standard displays are listed in Table 4-1. The display lists generated for single loop,
dual loop, and four loop control strategies are provided in Table 4-2. Selected displays that are
representative of the standard displays, as well as displays with alarm and horn overlays are
described and illustrated in remainder of the section. Where applicable, datapoints are identified
parenthetically with the display item call-outs in the illustrations. The datapoints are defined in
Section 5.
53MC5000 Process Control Station
4-2