PROFIBUS tester for quick quality diagnosis


Plug-in, measure, result!

Complicated, incomprehensible tables and diagrams were yesterday! The PROFIBUS tester PB-QONE enables a modern maintenance: you get precise measuring results in seconds which can be easily evaluated thanks to the graphic display based on the traffic-light principle. It is the only device on the market to offer fully automatic, non-reactive detection of the PROFIBUS topology under running production conditions. These and other useful features of the compact multifunctional device make it irreplaceable for every maintenance engineer who strives for simple quality diagnosis in the PROFIBUS network.

Your benefits

  • You save time
  • You save effort
  • You save money

Highlights PROFIBUS tester

  • Fully automated topology scan during operation
  • Ease of use, well-structured handling
  • Measuring results within seconds
  • Simple evaluation through traffic-light function
  • Complete physical and logical analysis for PROFIBUS DP & PA
  • Discover the PB-QONE & its advantages in moving pictures: To the video

Evaluate your PROFIBUS network precisely!

PB-Q ONE plug-in, measure, result


Art.-Nr. 110010050

Functions of PB-Q ONE

The PB-QONE is a tool for the complete evaluation of PROFIBUS communication quality. The hardware is connected to the PROFIBUS system by a supplied adapter.

Its simple, intuitive operability and the clear evaluation of the measurement results enable the state of the physical and logical transmission quality in the network to be reliably evaluated within seconds. In addition, the PB-QONE offers fully automatic and completely feedback-free topology determination under running production conditions. As a result, the PB-QONE records the actual connection of all network devices and even identifies repeaters, measuring points and the cable lengths between the devices. The graphic display shows measurement locations and segment structures at a glance. This makes the PB-QONE ideally suited for every thinkable application such as certification and commissioning, maintenance and service as well as troubleshooting. 

Quality values PROFIBUS tester Simple display of quality values
PB-Q ONE diagnostic view View of measuring results
PB-Q ONE topology function Topology with measuring site management

The levels of the bars (in green, yellow or red) infer a measure of the physical transmission quality which includes an evaluation of the differential voltage, rising edges and the transient response. As a result all capacitive, inductive and resistive effects become visible.

Watch the user video

User video PB-Q ONE


Reliable evaluation of


Evaluation of physical quality

Signal quality

The PROFIBUS tester is able to ascertain the amount of the voltage difference as well as the shapes of the signals during PROFIBUS telegram transmissions. The results are visualized in form of a bar diagram, showing a quality value for each analysed bus device.

Display signal quality PB-Q ONE

Signal to noise ratio

The signal to noise ration indicates the shortest distance between a logic "0" and the logic "1". It shows how far the signal of a device is affected by external interferences or signal fluctuations. It helps to recognize sporadic physical errors.

Display signal to noise ratio PB-Q ONE

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Evaluation of communication quality

Device details

All bus devices are presented in form of a tree diagram, including address, module name and device symbol. The colour highlighting (green, yellow, red) provides a quick condition evaluation of each device.

PB-Q ONE device information

Telegram mode

The telegram mode extends the range of analyses. A large number of filters and triggers is available to analyse the data traffic in terms events but also certain data content.

PB-Q ONE Telegram mode

Master simulator

The integrated master simulator is designed to determine the actually wired bus topology and analyse the signal quality of the connected bus devices. The master simulator is used in the offline mode without SPC.


Technical details

  • PROFIBUS interface: 9-pole sub-D
  • USB interface: USB 2.0
  • Transmission rate: 9,6 kBit/s - 12 MBit/s
  • Voltage supply: approx. 0,5 A via USB
  • Dimensions (H x W x D): 60 x 117 x 35 mm
  • Protective system: IP20
  • operating temperature: 0 °C to +50 °C
  • Storage temperature: -20 °C to +70 °C
  • Conformity: CE

Evaluate your PROFIBUS network precisely!

PB-Q ONE plug-in, measure, result


Art.-Nr. 110010050

PROFIBUS brochure

PROFIBUS brochure Indu-Sol GmbH

Basics and coherences of the proven technology in compact form as well as tips to latest valid standards and guidelines

EMC brochure

EMC brochure

The brochure explains how to build up a stable EMC structure of automation systems and detect interferences


Catalogue 2013/2014 Indu-Sol GmbH

Solutions and products for fieldbus and network analysis