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Operating manual for PROFIBUS fieldbus | 2015-07 | V1.7 EN
Fig.: 9 Setting parameters via rotary switches"
Switch 1
– for the unit position
Switch 2
– for the tens position
General instructions for addressing
The addresses "0" are reserved in the General Diagnostic Tools, for
example, programming devices.
The address "126" is conceived of as a delivery address (default value)
for bus participants in all rules; its address can be set via the field bus
(SSA service).
The address "127" is reserved for addressing all bus participants or
groups (broadcast) and may thus not be set on an FKO.
The addresses of the master stations should start with the lowest
addresses. This means that a single master has the address "1" and
additional masters then have the address "2", "3", etc.
A maximum of 124 free slave stations thus remain in a PROFIBUS
network with one master.
Repeater, coupler and FOC converter transmit their telegrams
transparently from segment to segment. They don't require their own
address for this reason.