Chapter 3 – Point Database
29
Siemens Industry, Inc.
BACnet ATEC Owner's Manaul
125-5050, Rev. AA
4/20/2010
Descriptor
Address1
Application
SWITCH DBAND 90 All
except
2560, 2561, 2597
The temperature range in degrees which is compared to the
difference between CTL TEMP and CTL STPT. The difference
must exceed this value for temperature control mode to
change over. Changeover is also subject to the active
temperature control loop output being below SWITCH LIMIT
(Point 85) and SWITCH TIME being expired.
CTL STPT {92} All
except
2597
The actual setpoint value being used as input for the active
temperature control loop.
FLOW STPT {93} All
except
2597
The setpoint of the flow control loop.
CAL AIR {94} All YES commands the controller to go through calibration
sequence for the air velocity transducers. YES is also
displayed when the calibration sequence is started
automatically. CAL AIR automatically returns to NO after the
calibration sequence is completed. Valid input: YES or NO.
CAL SETUP 95 All The configuration setup code for the calibration sequence
options.
CAL TIMER 96 All Time interval, in hours, between the calibration sequence
initiations if a timed calibration option is selected in CAL
SETUP.
DUCT AREA 97 All Area, in square feet (square meters), of the duct where the air
velocity sensor is located. This is a calculated value
(calculated by the field panel or computer being used) that
depends on duct shape and size. It is used in calculating all
points in units of CFM, CF, LPS and L.
Valid input: .025 ft2 (.002 m2) through 6.375 ft2 (.5923 m2).
LOOP TIME 98 All
except
2597
The time, in seconds, between control loop calculations.
ERROR STATUS {99}2 All The status code indicating any errors detected during
controller power up. A status of 0 indicates there are no
problems.
UI 1 CFG 102 All Configuration point for universal input 1 (digital, analog –
thermistor, 0 to 10V or 4 to 20mA).
PERCENT UI1 {103} All Universal input 1 when configured as 0 to 10V or 4 to 20 mA.
UI2 CFG 104 All Configuration point for universal input 2 (digital, analog –
thermistor, 0 to 10V or 4 to 20 mA).
PERCENT UI2 {105} All Universal input 2 when configured as 0 to 10V or 4 to 20 mA.
AIR ALTITUDE 106 All Optional correction factor for flow sensor based on altitude.
TUBE LEN 107 All
of air tube pickup.
TUBE DIAMETE 108 All Tube diameter (inside) of air tube pickup.
AUX TEMP UI2 {109} All Temperature sensor (when UI 2 is configured for 10K
thermistor).
STAT SUPV 126 All Room unit configuration point, values are additive.
RM RH 127 All Room humidity when room unit is provided with humidity
sensing.
1) Points not listed are not used in this application.
2) Point numbers that appear in brackets { } may be unbundled at the field panel.