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Netilities – User Manual
13 Using ProfiTap
A characteristic of PROFINET is that in the data exchange telegram there is no distinction possible
between controller and device telegrams when only sniffing is done using ProfiTap. This makes it
impossible to determine certain information.
Normally the "Search for PROFINET devices" button in Netilities can be used to ask all PROFINET
devices to identify themselves and to indicate which functionality they have. For this functionality
telegrams need to be sent, which is not possible if you only have a ProfiTap.
Therefore it is possible to manually assign functionality to a certain MAC address/device. For the
statistics visualization in combination with a ProfiTap, it is necessary to correctly assign the PNIOController. To do this, click on a station in the Live List and then press the right mouse button. A popup
will appear in which a functionality can be assigned to the device, see Fig. 17. These functionalities
can be assigned to a device:
 Controller



Device
Multidevice
Supervisor
Fig. 17 - Assigning device roles in the Live List
IMPORTANT: There are different modes of operation & situations when doing Ethernet
diagnostics, for using ProfiTap this is detailed in the next section.
13.1 Set-up
13.1.1 Only ProfiTap



All telegrams can be seen, but no telegrams can be sent.
If the startup procedure of the PNIO-Controller is not captured, the information visible is
limited.
A connection must be broken to insert the ProfiTap cabling
Netilities-Manual-EN.docx
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Version 2.2.2 – June 2014
Page 45 / 68
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