
13.2.5 Universal transmission and reception zones
Device RMS705B allows for universal data exchange via own terminals as well as
via terminals of extension modules RMZ78x. Data between devices is exchanged
via KNX bus.
Universal inputs, digital and analog outputs of RMS705B can be used as
transmission objects (for transmission zones).
Function principle
Universal inputs of RMS705B can be used as reception objects (in reception
zones).
Data is exchanged as if the device terminals were wired.
Max. 32 transmission and reception zones are allows per line (see N3127, P3127
on the KNX bus).
Number of transmission
and reception zones
Note "allowed" and "not allowed" applications due to KNX-bus-specific properties
(e.g. transmission frequency).
Note
Universal transmission and reception zones are allowed and sensible for:
Examples for allowed
applications
Controlling decentralized aggregates such as motors, pumps, etc..
Simple control functions that are not time-critical.
Common processing or use of bus information.
The following applications or input/output values may
not
be implemented using
universal transmission and reception zones:
Examples for not allowed
applications
Safety-relevant plants and equipment (e.g. fire alarm off, smoke extraction, frost
protection function).
If request "Simultaneous start condition of plants" exists.
Applications where communications failure of transmission
or
reception zones
may cause damage.
Time-critical control paths
or
control paths with greater degree of difficulty (e.g.
speed control via pressure, humidity).
Main controlled variables that must be available.
Acquisition and evaluation of pulses.
After RMS705B power-up, it may take some time until the bus signals are
available. This may result in faulty plant behavior in the case of transmission and
reception zone applications that are not allowed.
Note
To enable the function, set the desired transmission
or
reception zone at a terminal
in RMS705B. Set the partner device accordingly.
Enable
Transmission/reception is a 1:n relation, i.e. one sender and several recipients are
possible in a transmission/reception zone.
Note
184 / 216
Siemens
Switching and monitoring device RMS705B
CE1P3124en
Building Technologies
Communication
01.04.2010