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Communication
Note!
The initialization settings described here are indispensable for operation on a dial-up modem.
Nevertheless, it cannot be guaranteed that data are transferred after the initialization settings
have been adjusted. Due to the broad range of modems available on the market and the diffe-
rent commands, refer to the operating manual of the modem for further details.
GND TD DTR
DCD
RD
RTS
Fig. 8 · Pin assignment of RJ-12 jack
10.4 Meter bus interface
The TROVIS 5474 Controller can communicate with up to 3 heat and water meters according to
EN 1434-3.
Details on the use of the different heat or water meters can be found in the technical documenta-
tion TV-SK 6311.
10.4.1 Activating the meter bus
To successfully transfer data from the heat meter (WMZ) to the controller, the heat meter must
use a standardized protocol in accordance with EN 1434-3. It is impossible to make a general
statement about which specific data can be accessed in each meter. For details on the different
meter makes, refer to the technical documentation TV-SK 6311.
All necessary function block parameters to set up communication with heat or water meters are
available in Co9 -> Fb21 to Fb23. The meter bus address, the model code, and the reading
mode must be specified. A meter bus address must be unique and correspond with the address
preset in the heat meter.
If the preset meter bus address is unknown, a single heat meter connected to the controller can
be assigned meter bus address 254. Address 255 deactivates communication with the respec-
tive heat meter. The model code, which needs to be set for the respective heat meter, can be
found in TV-SK 6311.
In general, the default setting of 1434 can be used for most devices.
71
EB 5474 EN
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