System Text; System Graphics - Honeywell AUTOMATIC CONTROL Engineering Manual

BUILDING MANAGEMENT SYSTEM FUNDAMENTALS

System Text

BMS system text includes unique names for all controllers,
PCs, peripherals, and active communications devices. Each
building, HVAC system, and hardware and software point also
has a unique name. Each alarm point includes an alarm message
(such as "call maintenance") and may have an extended unique
alarm instruction of up to 480 characters. Extended messages
typically tell a BMS operator what to do, what not to do, what
to investigate, who to call, which forms to fill out, what to order,
etc. Unique system text may be in any language which uses
ASCII Characters.

System Graphics

A standard graphics package is used to develop system
graphics. System graphics start at the total system level
including all buildings and systems and are structured in a
logical penetration scheme down to the point level. BMS
software allows total operator editing including adding new
graphics. System points may be used on multiple graphics.
OUTSIDE AIR
DEG
81
AUTO
AHU A
STATUS
DA
% SPEED
NORMAL
CHILLER A1 CHILLER A2
AUTO
ADMINISTRATION
ENGINEERING MANUAL OF AUTOMATIC CONTROL
% RH
51
AUTO AUTO AUTO
AHU B AHU C AHU D
ON ON ON
57 56 55
66 71 77
BUILDING KW
516
45 55 78
NORMAL NORMAL
ON OFF OFF
BOILER A
AUTO OFF
BUILDING
Fig. 5. Top Level Graphic Display of a Two Building Facility.
Color is used to differentiate shapes and to define point
status. Red may be reserved for alarm, green may be reserved
for "Normal On", and yellow may be reserved for "Normal
Off". Strong color conventions unclutter graphics by needing
less explanatory text, for example; a yellow filter may be
clean, a red filter dirty, and a red and blinking filter dirty and
unacknowledged.
Buildings, ducts and piping, valves and dampers, floor plans,
and most text on graphics are typically static.
Graphics consist of artwork, text, and dynamic points with
no positioning restrictions for any element. Dynamic points
are typically presented as text in a box; such as 72.9 or Off.
The displayed text changes dynamically as the point status or
value changes. Displayed status and point values are
periodically updated or may be manually updated at anytime.
Dynamic points may be presented symbolically as the pumps
are in Figure 7. When presented symbolically, dynamic point
status and condition are indicated by colors.
ON
56
62
192
AUTO
AHU R
ON
55
% SPEED
76
BUILDING KW
771
45 136
NORMAL NORMAL
ON
ON
CHILLER R BOILER R
AUTO AUTO
MER R
RESEARCH
BUILDING
GRAPHIC 1
M15006