Page 39 - Serial Data Transmission and KNX Protocol

KNX TUTOR SEMINAR

Figure 6: Ctrl-Mode

6.2.2 PB-Mode

In PB-Mode, the configuration starts with taking Individual Addresses. Every separate
rd
device searches for itself a free Individual Address. Even further on, no 3 party - like
ETS or a central controller - is needed. Instead, the PB-Mode themselves configure each
other. The installer firstly selects an actuator Channel (typically by pressing a push button
on it) and then a sensor E-Mode Channel. The underneath figure sketches how these two
Channels (devices) then negotiate whether or not a link shall be established, and the
parameters and Group Addresses to be used for this. The installer can repeat the
procedure for this or another actuator Channel and other sensor Channels, always two by
two. The devices do not write each other’s Address Table or parameter memory. Instead,
PB-Mode device have some dedicated services and commands to do this without
knowing the mask and memory map of the communication partner.

Figure 7: PB-Mode

Home and Building Management Systems KNX Association
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