Addressing; Figure 25 Example Of Max Address Range And Slave Numbers On One Profibus Master - ABB LVS Digital Manual

A DDR ESSI NG

7.4 Addressing

PROFIBUS DP allows the address range of 0 to 127. Following reservations apply:
0, 1
2
126, 127
Above reserved addresses must not be used for PROFIBUS Digital Gateway or any other slave
device in the network. All other addresses are available for free use.
It must be ensured that the selected address is unique in a network connected to the
PROFIBUS Master. Double addressing in the network will cause communication errors on
PROFIBUS.
It is recommended to set the Highest Station Address (HSA) in the
Master
126)
The Digital Gateway does not support address setting / editing from the
PROFIBUS Master. The address must be defined with the LVS Digital parameter
"PROFIBUS Slave Address".
If more than 32 devices are connected to a segment, repeater devices have to be used. Such
repeater counts as one Slave within a segment without using an address number. Thus only
30 Slaves are possible within a segment.

Figure 25 Example of max address range and slave numbers on one PROFIBUS Master

3 4
- reserved; used for PROFIBUS Master
- reserved; PROFIBUS Digital Gateway address during re-boot only
- reserved
to 125 to be able to add new Slave devices (which have default address of
without a disturbance of the PROFIBUS communication.
CO NF IG UR AT IO NS
PROFIBUS
1 TG C90 80 04