SI-PROFINET RT User Guide
17
Issue Number: 2
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5.6
PROFINET device name
Every PROFINET device must have a unique device name assigned to it during
network configuration. Device names are used by the PLC to communicate with the
device for RT messages (cyclic data and alarms). Without a device name, the device
will not enter data exchange with the PLC.
The actual choice of device name is not important to the PROFINET IO system itself,
however a suitable name should be chosen so that it is easily recognized on the
network and identifies the location and function of the device.
A typical device name may contain up to four labels, each label is separated by a dot (.)
and may be up to 63 characters long. The device name must also satisfy DNS naming
conventions, therefore the following rules must be observed when choosing a device
name:
•
Maximum length of 127 characters
•
Characters must be either letters (lower case), numbers, dashes (-) or dots (.)
•
The device name must start with a letter and end with either a letter or number
•
The device name must not be of the format n.n.n.n (where n is a number from 0 to
999)
•
The device name must not begin with the character sequence 'port-xyz-' (where
x,y,z is a number from 0 to 9)
A typical example of a device name could be:
motor-1.conveyor-2.line-3.ct-4
The default name is specified in the GSDML file in the string value
'DNS_CompatibleName'.
Figure 5-2 SI-PROFINET RT setup flowchart
NOTE
Start
Connect all drives
together using
approved cable /
connectors /
repeaters
Perform cable tests
A dedicated
Ethernet cable
tester is
recommended
Ensure each device name
is unique and corresponds
to the network
configuration in the PLC
Ensure segment
lengths are no
longer than the
maximum limits
Configure cyclic
IO data
End
See Section 4
See Section 4
See PLC
documentation
Start PLC and
ensure there are
no errors
See PLC
documentation
See PLC
documentation
