Siemens RVL471 - Combination with SYNERGYR Central Unit OZW30; Communication with Other Devices; Data Bus

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Siemens Building Technologies Basic Documentation RVL471 CE1P2524E
HVAC Products 27 Communication 23.10.2002
8 2. Third heating period, start
of REDUCED heating
Changes operating line 8 on the RVL471
9 3. Third heating period, start
of NORMAL heating
Changes operating line 9 on the RVL471
10 3. Third heating period, start
of REDUCED heating
Changes operating line 10 on the RVL471
11 Entry of weekdays 1...7 Changes operating line 39 on the RVL471
12 Entry of time of day Changes operating line 38 on the RVL471
13 Display of d.h.w. temperature Only with plant types with d.h.w. heating
(corresponds to line 27)
14 Display of boiler temperature (Only with plant types 2–x)
15 Display of flow temperature (Only with plant types 1–x and 3–x)
16 Holidays RVL471 changes to standby
17 Reset to default values QAW70 default values are used
51 Bus address Bus address to be entered on the room
unit is 1
52 Identification of room unit Display on operating line 196 of the
RVL471
53 Operating lock on QAW70 No impact on RVL471
58 Type of setpoint display No impact on RVL471
If the RVL471 with a connected QAW70 is isolated from the mains network and then
reconnected, the following parameters on the QAW70 will be overwritten with the set-
tings made on the RVL471:
• Time of day and weekday
• Complete heating program
• Room temperature setpoint of REDUCED heating
• Room temperature setpoint of REDUCED heating
• NORMAL d.h.w temperature setpoint
This means that the RVL471 is always the data master.
27.1.4 Combination with SYNERGYR central unit OZW30
Based on the room temperature of the individual apartments, the OZW30 central unit
(software version 3.0 or higher) generates a load compensation signal. This signal is
passed on via the LPB to the RVL471 where it produces an appropriate change of the
flow temperature setpoint.
27.2 Communication with other devices
27.2.1 Data bus
The RVL471 offers the following communication choices:
• Signaling the heat demand of several RVL471 to the heat source
• Exchange of locking and forced signals
• Exchange of measured values such as outside temperature, return temperature and
flow temperature, as well as clock signals
• Communication with other devices
• Exchange of error messages
For detailed information about the communication via LPB, refer to the following pieces
of documentation:
• Data Sheet 2030, "Basic System Data"
• Data Sheet 2032, "Basic Engineering Data"
Overriding the QAW70
entries from the RVL471