Siemens 125-1957 Benutzerhandbuch - Seite 43

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Glossary

Overview

The glossary contains terms and acronyms that are used in this manual. For definitions of

point database descriptors, see Chapter 3, Point Database. For definitions of commonly used

terms as well as acronyms and abbreviations associated with the APOGEE Automation

System, see the Siemens Building Technologies Technical Glossary of Building Controls

Terminology and Acronyms, (125-2185). This book is available from your local Siemens

Building Technologies representative.

Analog Input. Physical point which accepts a continuous variable signal.

algorithm

Mathematical formula used to calculate an output value using varying inputs.

Analog Output. Physical point that generates a continuous variable signal.

centralized control

Type of control offered by a controller that is connected, by means of a Floor Level Network

(FLN), with an APOGEE field panel.

control loop

Proportional Integral Derivative (PlD) algorithm that is used to control an output based on a

setpoint and an input reading from a sensor.

DDC

Direct Digital Control.

Digital Input. Physical output point that accepts a two-state signal (that is, ON/OFF,

OPEN/CLOSED, YES/NO, etc.).

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