2
0
1
8
-0
7
24
Installation and Commissioning
Any subsequent attempt to change this address via the DTM software is rejected. In this case,
the hardware DIP switch settings have priority. To change a hardware address setting again,
use the DIP switches.
After modifying the address DIP switches, the device must be rebooted in order to use the new
setting. Either disconnect the device from the fieldbus and then reconnect it, or restart the
device via the DTM.
Figure 3.2
DIP switches to set the PROFIBUS address on the device
■
By default, the MIO device is delivered with the address set to 126, with the DIP switches
S1 ... S7 set to ON. This enables the modification of the address via the bus.
■
An address set via the bus remains active, even if the device has been temporarily
disconnected from the bus.
■
If an address in the range of 1 ... 125 is set via the DIP switches, this address overrules an
address previously set via the bus.
Assigning a PROFIBUS Address via the Device Type Manager
In order to enable software address setting of the MIO device, set the DIP switches either to
126 or 127. For details on how to change the address via the fieldbus, refer to the
documentation of your configuration tool.
When the address is changed, the device automatically reboots, using the new address
afterwards.
Write Protection Settings
To protect the parameters from modification you can use write protection.
Write protection has the following effects:
■
Acyclic write access is blocked
Address
S1 (2
0
)
S2 (2
1
)
S3 (2
2
)
S4 (2
3
)
S5 (2
4
)
S6 (2
5
)
S7 (2
6
)
0
OFF
OFF
OFF
OFF
OFF
OFF
OFF
1
ON
OFF
OFF
OFF
OFF
OFF
OFF
...
126
ON
ON
ON
ON
ON
ON
ON
PROFIBUS
address setting
Position ON = logical 1
Position OFF = logical 0
1 2 3 4 5 6 7
8
Hardware
write
protection
ON
