Siemens SIMATIC ET 200AL, System Manual

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Parameter assignment/addressing
3.2 PROFIBUS address
PROFIBUS with STEP 7 V13
Function Manual, 12/2014, A5E03775446-AC
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3.2 PROFIBUS address
Devices can be connected to the PROFIBUS subnet that communicate by means of
configured connections or that are part of a PROFIBUS DP master system.
If the DP slave has already been assigned to a DP master, the PROFIBUS subnet to which
the device is connected is automatically displayed under "Interface linked with".
In the Inspector window under "PROFIBUS", select the subnet to which the interface is
linked or add a new subnet.
All devices of a subnet must have different PROFIBUS addresses.
Figure 3-2 PROFIBUS address
Rules for address assignment
STEP 7 automatically assigns device addresses.
You can change the addresses if you observe the following points:
●
Assign a unique PROFIBUS address to each device in the PROFIBUS network, each DP
master and each DP slave in the PROFIBUS network.
● Depending on the DP slave, not all permitted PROFIBUS addresses are supported. For
devices with BCD switches, it is often the case that only the PROFIBUS addresses 1 to
99 are supported.
Changing the PROFIBUS address
You change the PROFIBUS address under "Parameter".