Function
WE
Parameter level / Range of values
Creep feed rate limitation
0
1
CO5 -> F12 - 1
bE = 0, 1
7.12 Device bus
Using the device bus, it is possible to connect up to 32 device from the Series 55xx. For con-
nection, the TROVIS 5576 Controller is, above all, equipped with the terminals 29/30.
No attention must be paid to the polarity of the device bus wiring.
Danger of short circuit!
If several TROVIS 5576 Controllers in one plant are to be connected to the building control
station using the system bus interface and the cable converter 1400-8800, remember that all
controllers sharing the same bus distributor are also connected via the device bus. Do not
wire such controllers in “parallel“ by connecting terminals 29/30.
Activate the device bus and specify the device bus address for each device. Note that the de-
vice bus address 1 is to be set for just one controller in the system, and that all device bus
addresses must be unique. The controller with device bus address 1 implements the required
bus terminator for the system.
Once the controllers have been connected and programmed, additional functions can be
configured. These partly application-specific functions include:
4
Requesting and processing an external demand (–> page 80)
4
Sending and receiving outdoor temperatures (–> page 82)
4
Synchronizing the clock (–> page 82)
4
Priority over all controllers (–> page 83)
4
Connecting a TROVIS 5570 Room Panel (–> page 83)
4
Display error alarms issued by the device bus (–> page 84)
7.12.1 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
demand. Usually, the secondary controllers are configured such that they send their maxi-
mum 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
register number.
80
EB 5576 EN
System-wide functions
!
