Introduction
©
COMSOFT
3
3 Introduction
With the PROFIBUS
NetTEST II
you have acquired a high-
quality tool for the examination of RS485-based PROFIBUS
segments.
COMSOFT
’s aim is to provide its users with a valuable tool
for an easy check, without extensive test methods of the
correct cabling of their PROFIBUS net and to document this.
Furthermore, the search for errors in already installed
PROFIBUS systems shall be as easy as possible. We guess that
we reached this target with
NetTEST II
, the 2
nd
generation of
COMSOFT
PROFIBUS test tools.
Therefore it goes without saying that with
NetTEST II
, the
checks can be run with connected and disconnected devices. It
does not matter if the devices are powered or not. For physical
testing you only have to ensure that there is no active Master
(PLC) polling the bus.
Besides the standard cable test, i.e. the verification of the lines
regarding
cable length
,
line impedance
,
correct termina-
tion
,
cable rupture
,
broken shield
,
stub lines
,
inhomoge-
neous cable segments
,
mixed up cables
,
short circuits
,
faulty PROFIBUS connectors and faulty device connec-
tions
,
NetTEST II
disposes of PROFIBUS DP specific test
functions. So, e.g. the
livelist
and the
Slave Ident Number
are indicated, also the
transmission level
of the Slaves
connected to the bus is detected per device. Furthermore,
NetTEST II
detects the current
baud rate
at the running bus.
During the baud rate scan a
signal analysis
indicates faults or
errors in the cabling.
Содержание NetTEST II
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