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1.8
isNet PAMon and DPMon
With the isNet DPMon and isNet PAMon modules the head mod-
ule isNet Lite can be enhanced by diagnosis and protocol monitor
functions. The modules detects and diagnoses sporadically occurring
problems during data transmission on a PROFIBUS network. The
modules identifies configuration problems in the transmission proto-
col as well as electrical faults that cause interruptions.
The DP monitor module offers one channel that can be connected
to the PROFIBUS network via a D-SUB 9 connector. The PA moni-
tor module offers two channels working independently from each
other that can be connected to the PROFIBUS network via screwtype
terminals. Both monitor modules work totally passive; no telegrams
are sent to the bus. The modules evaluate the status of all stations
on the bus and provide a concise overview about it if needed. In this
view the bus status of every single layer of the OSI reference model
is separately detected and can also be addressed separately.
The modules also offer a protocol monitor, an integrated 200 MHz
oscilloscope and an extensive analysis of statistical data, e.g. error
counters or average time intervals. Long term monitoring allows au-
tonomous operation for a long period of time even if the Net Lite is
not connected to the PC. The protocol file is saved on a memory card
and can later be downloaded to a PC.
The accompanying software isField Diagnosis (see page 67) is used
to access the diagnosis functions.
