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Building Technologies Basic documentation: Communication via the KNX bus CE1P3127en
HVAC Products Appendix 30.08.2007
Cmf
∆
p
T
Room unit
(in reference room)
Air supply
range
Central air
treatment
Hot water
precontrol
°C
Chilled water
precontrol
Hot water
precontrol
Coordinator
Hot water precontrol
User
requisition
Hot water
production
Chilled water
production
Hot/chilled water
production
Air
handling
Air
consumers
Coordinator
Hot water production
Dispatcher
Hot water production
Poss. air
shutoff dampers
HMI
3127Z41en
Hot water
production
HMI
HMI HMI
HMI HMI
Plant Functional units
Operato
intervention
Air treatment
(supply air control)
Water
distribution
Reference room
control ventilation
Reference room
control ventilation
Coordinator
Chilled water precontrol
Chilled water
precontrol
Coordinator
Chilled water production
Dispatcher
Chilled water production
Chilled water
production
9.5.1 Data exchange in LTE mode
The control chains and control circuits in an HVAC plant consist of data points. The
data points or their process values are programmed in function blocks to create the
technical functions in the HVAC process.
For the exchange of process values between the Synco devices within a zone, it is
sufficient simply to allocate a common zone address to those devices.
In LTE-mode (LTE = Logical Tag Extended) the communication bindings between
data points are created by means of logical tags. This is the equivalent of the zone
addresses in Synco.
LTE mode does not require time-consuming engineering to create the
communication bindings for the exchange of process values.
Example
Data exchange
LTE mode
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