Samson TROVIS 5579 - Activating the Meter Bus

9.4.1 Activating the meter bus
To successfully transfer data from the heat meter to the controller, the heat meter must use a
standardized protocol in accordance with EN 1434-3. It is not possible to make a general
statement about which specific data can be accessed in each meter. For details on the differ-
ent meter makes, refer to the technical documentation TV-SK 6311. All necessary function
block parameters to set up the communication with heat or water meters are available in
CO6 -> F10. The meter bus address, the model code and the reading mode must be speci-
fied for the heat meters WMZ1 to WMZ6. A meter bus address must be unique and corre-
spond with the address preset 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 via the system bus interface.
In extended operating level, the data point “buS“ (status information of meter bus) is avail-
able when the meter bus is activated. Press the rotary pushbutton to display the following in-
formation about the activated meters “buS 1“ to “buS 6“ (WMZ1 to WMZ6):
4
Flow rate
4
Total capacity
4
Capacity
4
Energy
4
Flow temperature
4
Return flow temperature
4
Meter identification number
4
Meter bus address (sent by WMZ)
Blinking values in combination with black squares in the top row of the display (error status
of the associated meter –> TV-SK 6311) indicate various faults. The controller issues the
“Err 9” or “Err 10” error messages.
Note: With reading mode “24h“, the displayed values are not updated by reopening the
levels “buS 1“ to “buS 6“; the values read during the last cycle remain unchanged.
With reading mode “CONT“, the values in the levels are not continuously updated. You have
to reopen the specific level to get current values.
EB 5579 EN 123
Communication