Siemens BACnet ATEC 125-5050 - Manual (Page 32)

Glossary
32
Siemens Industry, Inc.
BACnet ATEC Owner's Manaul
125-5050, Rev. AA 4/20/2010
Glossary
The glossary contains terms and acronyms that are used in this manual. For definitions
of point database descriptors, see Chapter 3 - Point Database [ 24] , in this manual.
airflow
Rate at which a volume of air moves through a duct. Usually expressed in cubic feet
per minute (cfm) or liters per second (lps).
algorithm
Mathematical formula that uses varying inputs to calculate an output value.
AVS
Air Velocity Sensor.
centralized control
Type of control offered by a controller that is connected by means of Field Level
Network (FLN).
cfm
Cubic Feet per Minute.
control loop
PID algorithm that is used to control an output that is based on a setpoint and an input
reading from a sensor.
DDC
Direct Digital Control.
DO
Digital Output. Physical output point that sends a two-state signal (ON/OFF,
OPEN/CLOSED, YES/NO).
English units
The foot-pound-second system of units for weights and measurements.
equipment controller
FLN device that provides additional point capacity to a field panel or provides individual
room or mechanical equipment control.