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Siemens
Heating and D.h.w. Controller RVL481
CE1P2541en
Building Technologies
25 Function block "Service functions and general settings"
20.05.2008
25.5.2 Outside temperature source
If, in interconnected plants, the outside temperature is delivered via the bus, the tem-
perature source can be addressed either automatically or directly (operating line 180).
•
Automatic
addressing:
Display, entry
Explanation
SET A (For
automatic
addressing)
ACTUAL
xx.yy
Display of source address selected by automatic addressing:
xx = segment number
yy = device number
•
Direct addressing:
To be entered is the source address: xx.yy
xx = segment number
yy = device number
If the controller is operated autonomously (with no bus), there will be no display and no
entry can be made.
If the controller is used in an interconnected plant
and
if it has its own outside sensor, it
is not possible to enter an address (if an entry is made, the display shows OFF). In that
case, the controller always uses the outside temperature signal delivered by its own
sensor. The address displayed is its own.
For detailed information about addressing the outside temperature source, refer to Data
Sheet N2030.
25.5.3 Addressing the devices
Each device connected to the data bus (LPB) requires an address. This address is
comprised of a device number (1…16, operating line 169) and a segment number
(0…14, operating line 170).
In an interconnected plant, each address may be assigned only once. If this is not ob-
served, proper functioning of the entire plant cannot be ensured. In that case, a fault
status signal will be generated (error code 82).
If the controller is operated autonomously (with no bus), the device number must be set
to zero.
Since the device address is also associated with control processes, it is not possible to
use all possible device addresses in all types of plant:
Plant type
G = 0
S = any (no bus)
G = 1
S = 0
G = 1
S = 1…14
G = 2…16
S = any
1–x Permitted Permitted
Permitted
Permitted
2–x Permitted Permitted
Permitted
Not
permitted
3–0, 3–2,
3–4, 3–5,
Permitted Permitted
Permitted
Permitted
3–1, 3–3
Permitted
Not permitted
Permitted *
Not permitted
4–x
Not permitted
Permitted
Permitted
Not permitted
5–x Not
permitted
Permitted
Permitted
Permitted
6–x
Not permitted
Permitted
Permitted
Not permitted
G = device number
S = segment number
* No other controller may be addressed in the same segment!
If an inadmissible address has been entered, an error message will appear (error
code 140).
For detailed information about the addressing of devices, refer to Data Sheet N2030.
