Graphic Displays - Honeywell AUTOMATIC CONTROL SI Edition Engineering Manual

INDOOR AIR QUALITY FUNDAMENTALS
Operator graphic displays with meaningful real-time dynamic
data displays can enable building operators to understand how
the building is operating. CO
drain pan alarms can all provide operator information required to
maintain IAQ. Further, trend logging and dynamic displays can
allow the designer and operator to analyze the building
performance historically or in real-time. And a real-time predictive
maintenance program with status inputs such as filter and drain
pan alarms can be used to prevent degradation of air quality.
Dynamic graphical operator interfaces providing intuitive
"snapshot" system displays, three dimensional multipoint
dynamic and historical plots, and live video displays of critical
systems are available for a BMS and can be employed in IAQ
application. When these functions are specified, the operator's
value is greatly enhanced by a better understanding of the HVAC
system operation and by real time feedback to adjustments that
are made.
EA
83
17
83
OA
10
ON
ECONOMIZER
STATUS
22
OA MINIMUM SETPOINT
(NOTE: THE TEST AND BALANCE
INITIAL VALUE FOR PROPER
VENTILATION IS 22)
, VOC, airflow, DP, SP, filter, and
2
24
ON 58
PERCENT
LOAD
14
NORMAL
00
-0.06
-0.06
RELATED
GRAPHICS
FLOOR
PLAN
ECONOMIZER
CONTROL
DISCHARGE
AIR RESET
Fig. 7. Sample Minimum Operator Graphic Display.
For additional information on system configuration, network
communications, and specifying graphics, refer to the Building
Management System Fundamentals section.

GRAPHIC DISPLAYS

Figure 7 provides a sample of an operator graphic showing
the functional software relationships that control the system.
Actual values for the temperatures, air flows, and valve and
damper positions and percent fan loads are all shown for the
operator. In addition, the control and logic functions that control
the system are shown. The rectangle in the lower right corner
is a set of selection buttons which allow the operator to look at
additional data. Clicking on one of the buttons produces an
operator display similar to Figure 8.
EXHAUST
FAN
RA
ON
4.53 cm/s
NORMAL
ON
63
PERCENT
LOAD
76
WARM-UP
MODE
ON OFF
32 13
ENGINEERING MANUAL OF AUTOMATIC CONTROL
168
ZERO
EXHAUST
CALIBRATION
FAN "ON"
360
DIFFERENTIAL
CM/S
SPACE
1.274 PRESSURIZATION
DIFFERENTIAL
0.61
CONTROL
PROGRAM
6.423
cm/s
SA
13
0.45
MAXIMUM
SETPOINT
SA
OA
TEMPERATURE
SETPOINT TEMPERATURE
13 5
16 -21
cm/s
0.45 kPa
M15129