Page 30 - Serial Data Transmission and KNX Protocol

KNX TUTOR SEMINAR

a. telegram format for useful data of up to 6 bits:
00 01 dddddd

b. telegram format for useful data larger than 6 bits:

00 01 xxxxxx dddddddd . . . Dddddddd

4
x...x: no significance
d...d: data

GroupValueWrite
Write operation to and from group object(s): The contents of a group object is
transmitted onto the bus, together with the sending group address assigned, e.g. when a
push button sensor is being operated or the contents of a group object is overwritten, if
the indicated target address is the assigned group address (e.g. relay switches on or off)..

a. telegram format for useful data of up to 6 bits:
00 10 dddddd

b. telegram format for useful data larger than 6 bits:

00 10 xxxxxx dddddddd . . . dddddddd

x...x: no significance
4
d...d: data

IndividualAddressWrite
Setting the individual address of those bus devices of a KNX installation that are currently
in the programming mode (the programming LED of these devices light up). The target
address in the telegram is 0/0 (broadcast).

00 11 xxxxxx BBBBLLLL TTTTTTTT
4
x...x: no significance
BBBBLLLL TTTTTTTT: individual address to be assigned

IndividualAddressRequest
Reads the individual address of all those bus devices within a KNX installation that are
currently in the programming mode (the programming LEDs of these devices light up).
The target address in the telegram is 0/0 (broadcast).

01 00 Xxxxxx

x...x: no significance
4

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