Samson TROVIS 5500 - Flow Rate And;Or Capacity Limitation with Meter Bus

118 EB 5573-1 EN
Communication
be unique and correspond with the address set in the WMZ. If the preset meter bus address
is unknown, a single heat meter connected to the controller can be assigned the meter bus
address 254. The address 255 deactivates the communication with the respective WMZ. The
model code to be set for the heat meter can be found in TV-SK6311. In general, the default
setting of 1434 can be used for most devices. The meters can be read either automatically
every 24 hours (approx.), continuously or when the coils (= Modbus data points) assigned to
the heat meters WMZ1 to WMZ6 are overwritten with the value 1 over the system bus inter-
face. In extended operating level (see note on page9), the respective measuring and
limit values are displayed after conrming the plant scheme when the ow rate and/or ca-
pacity limitation is congured.
Note:
After restarting components (controller or gateway) by connecting them to the power
supply, it may take up to two minutes before the controller allows access to
CO6 > F10.
Functions WE Conguration
Meter bus 0
255
1434
24h
CO6 > F10 - 1
WMZ1...x address*: 0 to 255
WMZ1...x model code*: 1434, CAL3, APAtO, SLS
WMZ1...x reading mode*: 24h, CONT, CoiL
* TROVIS5573-100x: WMZ1...6; TROVIS5573-110x: WMZ1...3
10.4.2 Flow rate and/or capacity limitation with meter bus
The refreshing rate of the measured variable (ow rate and/or capacity) must be less than
ves seconds to ensure that the limitation can be performed properly. The technical docu-
mentation TV-SK 6311 lists the heat meters which comply with this criterion and, therefore
can be used for limitation. Note that some makes, particularly battery-operated heat meters,
respond with communication pauses when they are read too frequently. Others might run out
of energy early. For details, refer to the above mentioned TV-SK document.
− A system with simultaneous room and DHW heating requires maximum energy.
− A system with a fully charged storage tank that is only used for room heating requires
less energy.
− A system that suspends room heating during DHW heating requires less energy.
As a result, three different maximum limit values for RK1 can be adjusted in all systems with
only one control valve and DHW heating on the secondary side:
