Function Block: "Room Group; Overview - Siemens RMB795B Basic Documentation

Connections
Functions and
characteristics
Same operating mode,
but different setpoints
56 / 144
Siemens
Building Technologies
8

Function block: "Room group"

8.1

Overview

The following illustration displays the function block "Room group 1"and its
connections and selection fields as shown on the configuration sheet:
x x x x x x
Enable
Setpoint prio
Room group 1
Relay
1
Q Q
The connections and functions are described in the following sections.
The most important features and functions of the room group are the following:
• On an RMB795B central control unit, up to 10 individual room groups can be
activated or configured
• One room group consists of 1 up to (theoretically) 63 rooms
• Every room group has its own time switch. Time switch entries can be copied
• Each room group can make use of a calendar. This calendar can act on several
time switches or room groups
• For the entire room group, the same...
– Room operating modes apply (Comfort, Precomfort, Economy, Protection);
can be influenced via calendar, time switch program, user interventions.
– Room setpoints apply; can be switched on and off via parameter "Setpoint
priority".
Setpoints can be overwritten or changed on each individual room controller
where "Setpoint priority = Yes".
– Setpoint readjustments apply (summer/winter compensation, QAW740
room unit).
– Emergency modes apply (fire shutdown, smoke extraction).
– Room group control (Auto, Heating, Boost heating, Cooling, Night purge,
Precooling, Off, Emergency heating, Fan only, Free cooling). Extra functions,
such as Night purge, can be activated, depending on the type of application.
–
External signal sources integrated via digital inputs (timer, manual switch) can
simultaneously act on several room groups. Example:
Central control unit RMB795B
Function block: "Room group"
x x
SA EA
2
CE1P3122en
18.01.2012