4
Requesting and processing an external demand (–> page 84)
4
Sending and receiving outdoor temperatures (–> page 85)
4
Synchronizing the clock (–> page 86)
4
Priority over all controllers (–> page 86)
4
Connecting a TROVIS 5570 Room Panel (–> page 87)
4
Display error alarms issued by the device bus (–> page 87)
7.11.1 Requesting and processing an external demand
In general, the controller which controls the primary valve or boiler (= primary controller) in
a system of coupled controllers will process the demand of all subsequent controllers (= sec
-
ondary controllers). As a result, the primary controller must be configured to receive this de
-
mand. Usually, the secondary controllers are configured such that they send their maximum
flow set point to the primary controller. In special cases, however, it might happen that only
the set point of a control circuit is to be sent. The appropriate function blocks to do so are
also available. After the desired function blocks have been activated, you must specify a reg-
ister number.
The following applies: in a system of coupled controllers which are hydraulically supplied by
a primary controller all controllers (primary and secondary controllers) must be adjusted to
the same
Register no.
for the “demand registers“. A controller which is configured to receive
a demand in register no. 5 will not process a demand sent to register no. 6. The primary
controller compares the received requested demands and its own requested demands and
supplies the system with the required flow temperature – if necessary increased by the value
of the parameter
Set point boost for primary exchanger control
.
Note!
Overheating may occur in the heating circuits of the primary controller without control valve.
Primary controller:
Functions
WE Configuration
Device bus 0
32
CO7 -> F01 - 1
Device bus address
Receive external demand 0
5
CO7 -> F15 - 1
Register no. / 5 to 64
Parameter
WE Parameter level/Range of values
Set point boost for primary exchanger control 5 °C PA1 / 0 to 50 °C
84 EB 5575 EN
System-wide functions
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