User Guide

Total Room Automation
1
Central Functions
11
Siemens Desigo TRA User Guide
A6V10415564_en_a_21
Building Technologies 2015-06-23
1.1 Central Functions
Central functions permit and support the centralized control and coordination of
defined groups. Typical central functions include:
 Central occupancy definition
 Central setpoints
 Central hot water/chilled water coordination (Optimization of primary plants,
supply chain optimization)
 Central lighting control
 Central emergency lighting control
 Central blinds control
Building overview
Various sources provide input for a central control function, including:
 Signals from an external system
 Commands from a system operator
 Commands from a building user
 Signals from room automation stations
 Commands from a scheduler program
 Commands from superposed central control
These signals and commands are evaluated by the central function. The central
function sends the result via the group master and group members to the
subordinate functions.