What you need to know about PROFIBUS Analysers

13 January 2017

If you have an existing network, you are responsible for the installation and commissioning of new networks or conducting testing on Profibus systems you most certainly require a high-performance bus analyser.

Although Certified Profibus Training is one of the most fundamentally important steps required, even with this training it is almost impossible to diagnose, commission and analyse Profibus systems blind. Certified Profibus Engineers utilise modern engineering tools like the ProfiTrace Ultra kit to assist them on each project.

What features should I expect from my PROFIBUS analyser?

Based on the ProfiTrace Ultra Pro Kit:

  • Live list overview, showing the overall health of each Profibus node
  • Message recording and reporting functionality
  • High-performance bus statistics with a summary view
  • Advanced oscilloscope with differential and combined signal view
  • Bar graph showing all driver voltages, including a varying high-low view
  • Network topology detection, cable length measurement Profibus master simulator – allowing active network
  • Configuration utilising its built-in GSD file database

How will these features assist me in troubleshooting a plant trip?

Let us start by discussing the main causes of failure in Profibus networks. In my experience, Profibus networks give trouble when one or more of the following issues is prevalent (not limited to):

  • Terminations
    Terminations are solely responsible for 90% of the Profibus network issues we experience day to day. With a quick analysis of the oscilloscope waveform and the Profibus driver voltage levels, the Profibus Engineer can quickly identify whether the network has a missing termination, over termination or termination in the incorrect place.

  • Duplicate address
    Duplicate addresses most commonly occur during plant commissioning, upgrades and when replacing a Profibus node. Network trips and failures with a duplicate address are inevitable. An analysis of the driver voltages, bus statistics (Illegal messages, Syncs) as well as a view of the network live list will help to identify the culprit.

  • EMC and incorrect grounding
    EMC is very commonly found within the industry and often results in network trips and sub-optimal network performance. EMC often occurs when the bus cable runs in close vicinity to high voltage cables and machinery, this causes corrupted Profibus messages by distorting the Profibus signal waveform. The level of impact EMC causes is identified by an analysis of the oscilloscope waveform of each device, within multiple segments. Identification of various bus statistics is also very useful.
  • Exceeding Profibus cable length specifications
    Within the Profibus specification, various maximum and minimum cable lengths are identified, violation of these segment lengths will more often than not result in network failure. The minimum cable distance between any two devices is 1 meter, the maximum depends on the baud rate at which you are running your network, for example at 1.5 Mbps you can run a maximum of 200 meters of cable before you require a repeater.

Often it is difficult to identify if there are exceeding cable lengths due to the cable running in and out of cabinets and spanning across the various levels of the plant. ProfiTrace will assist you in measuring the exact cable length during diagnostics. Certified Profibus Engineers will also be able to identify the symptoms of attenuation, such as decreasing driver voltage levels and noticeable ‘riding’ of the signal waveform.

<a href="https://blog.idx.co.za/author/kyle/" target="_self">Kyle Roos</a>

Kyle Roos

Site Services Manager

Kyle specialises in industrial data communication protocols and systems. Operating in the space of design, development, integration, technical sales and support, advanced troubleshooting and training.

Show your love!

Recent Posts

Driving Productivity with LineView Training

In light of our partnership with LineView Solutions, our team has taken up the opportunity to equip themselves with insights into the LineView system and its impact on the industry. “LineView is a production line monitoring and recording system that automatically...

Exciting New Launch: Onsite ProfiDay

IDX is excited to announce the launch of our onsite ProfiDay offering. This is available to all industries and companies that utilise PROFIBUS and/or PROFINET within their industrial communications systems. What is ProfiDAY? An exclusive onsite program offering...

Introducing our Partnership with LineView Solutions

We are excited to announce our partnership with LineView Solutions, a leading UK-based company specialising in smart factory solutions for optimising production processes. LineView developed a cutting-edge software suite designed to automatically gather data from the...

Optimise PROFIBUS and PROFINET Network Performance

As a field technician handling PROFIBUS and PROFINET systems, it is crucial to recognise the common errors that can result in costly downtime. From improper network configuration to neglecting regular maintenance, these mistakes can greatly affect system performance...

Delighted Customer Shares Experience

We recently assisted a client in rectifying damage to the Anybus ABC4090 Communicator caused by incorrect power usage onsite. We arranged for the device to be sent to HMS in Sweden for repairs, and they restored it before promptly returning it to us. Here are some...

Price Decrease on PROFIBUS Connectors

PROFIBUS connectors play a crucial role in industrial automation and data exchange systems by facilitating smooth communication between devices and networks. We are pleased to announce a significant price decrease on all our PROFIBUS connectors. Thanks to recent...

PROFIBUS Standards: Functional bonding and shielding

Electromagnetic Interference (EMI) and earthing issues can significantly impact the performance of your network. By following these six proven recommendations, you can ensure that your network is always up and running.

PROFIBUS Standards: Terminations

What is the Volts Direct Current (VDC) required for optimal operation of a PROFIBUS DP termination circuit? Get the answers you need in our latest video on PROFIBUS Standards: Terminations. Don't miss out on this essential knowledge to boost your system's performance!

PROFIBUS Standards: Segment Cable Lengths

Finding the perfect balance between PROFIBUS cable length and network speed is crucial. While longer cable segments might seem tempting, they can lead to signal degradation and slower speeds. Conversely, too short segments might limit your layout options. Striking the...

Sign up for our newsletter

Get exclusive updates and a sneak peek into our world every two months. Stay connected, stay informed.

Related Posts

Our expertise lies in establishing, maintaining, and leveraging plant data for business benefit. Through our innovative solutions, we work alongside you to streamline processes, enhance efficiency, and reduce costly downtime.


Main: +27 (11) 548 9960
Sales: +27 (11) 548 9970


Copyright @2024 Industrial Data Xchange. All rights reserved.