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Siemens
Central control unit RMB795B
CE1P3122en
Building Technologies
Function block: "Room group"
18.01.2012
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
Q Q
x
x
x
1
2
SA EA
Relay
Setpoint prio
Enable
Room group 1
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:
Connections
Functions and
characteristics
Same operating mode,
but different setpoints
