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For internal use only
Siemens
KNX bus communications
CE1P3127en
Building Technologies
Appendix
2013-04-08
9.5 Supply chains
The applications in the Synco 700 type RMU/RMH controllers consist of HVAC
functional units. These functional units are based on the supply chains in buildings.
A supply chain consists of at least one producer and one consumer, but often
producer, distributor, and consumer.
1. A producer with one distributor and one consumer.
2. One producer with two distributors in series and one consumer.
3. Several producers, distributors, and consumers in parallel.
Source
Distributor
Consumer
Coordinator
Dispatcher
3
1
2
7
Z
3
3
e
n
C1
C1
C2
D1
D1
D2
S1
S2
1.
2.
3.
S..
C..
D..
S1
S
D
C
D2
Down =
stream
Up =
stream
D1
C1
S1
C
o
n
s
u
m
e
r
s
id
e
S
o
u
rc
e
s
id
e
The "coordinator" and "dispatcher" are defined as logical elements in the supply
chain. Their role is as follows:
The coordinator collates the demand signals from all downstream links in the
chain, and delivers the resulting demand signal to the link upstream. The
coordinator also reports the operational status of the upstream links to the
downstream link.
From the resulting demand signals of the consumers, the dispatcher determines
which generators, and how many, must be enabled.
The above illustrations of supply chains show the following:
Consumer
has one output to the distributor.
Producer
has one input from the distributor.
Consumer
transmits heating/refrig.
demand
to the upstream distributor
Producer
receives heating/refrig.
demand
from the upstream distributor.
Supply chain
configuration
Supply chain outputs and
inputs
Supply/demand
