Instructions

Introduction

3 Introduction

With the PROFIBUS NetTEST II you have acquired a high-

quality tool for the examination of RS485-based PROFIBUS

segments.

KUNBUS’ 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

generation of

KUNBUS 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 termination,

cable rupture, broken shield, stub lines, inhomogeneous

cable segments, mixed up cables, short circuits, faulty

PROFIBUS connectors and faulty device connections,

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.