User Manual
85/90
Building Technologies Integration of DESIGO™ RXC CM2Z8338en_01
Building Automation Commissioning 12.06.2006
5.7 Operation of the HVAC groups
The diagram below again shows the example of the "Definition of HVAC groups"
TCR 1 TCR 2
TCG 1
TCG 2
TCR 5
TCR 6
TCR 3 TCR 4
T
T
RXC RXC RXC RXC RXC RXC
RXC RXC RXC RXC RXC RXC
South
North
01041E
Ware-
house
P
roduction
Offices
The rooms are allocated to the groups in the GroupConfig.COL file. (Refer to the
section on defining groups in the "Engineering" section). The CFE software converts
the room allocations defined in the GroupConfig.COL to the room parameter TCR of
the group points:
@TCGn.TCR(p)=m n: HVAC group number (1..200)
p: Index of HVAC room within HVAC group (1..20)
m: Number of HVAC room (1..99)
The allocation of the rooms can be viewed with the COLBAS command
LIST @TCG / R.
The following standard TEC functions are implemented throughout an entire TEC group
(TEC master functions of the BPS)
– Statistical calculations (Min / Max / Mean room temperature and % share of
operating modes)
– Setpoint correction based on outdoor temperature
(summer/winter compensation, and see "Mapping functions", 3.1.11)
– OSC function (Optimum Start Control)
– The above are described in document CM2T8568en "System principles VVS20"
under "TEC Points in the BPS – TEC Standard Functions".
–
– The TEC group functions are operated via the following @TCG parameters:
– Summer/winter compensation parameters IWI / ISU / BSTP / SIDTO
– OSC parameters OSCA / OSTH / OSTC
– Operating mode defined for whole group SOPST / SOMOD
– Setpoint defined for whole group SPCH / SPCC etc.
Setpoint shift defined for whole group @VIPn
For more information on the parameters refer to document CM2Z8303e
"BPS Process Image" under "FLN Points".
Note that the setpoint shift for the whole group is defined not via parameter RRSC, but
via the @VIPn (main value VP) associated with the group @TCGn. The CFE software
passes @VIPn to the RRSC of all rooms @TCRm belonging to the group.
Example
Allocating the rooms
to groups
Group functions
Operating the groups