IO-Link Diagnosis Tool – Electrical and Logical IO-Link Signal Analysis

The IO-Link Diagnosis Tool is an IO-Link analyzer that electrically and logically examines the IO-Link signal. It is an indispensable tool for engineers and users of IO-Link technology to identify any type of problem in the IO-Link connection.

Can I try the IO-Link Diagnosis Tool before purchasing?

Yes – we rent out the Diagnosis Tool for 3 or 6 months. If you decide to purchase it afterward, the rental fee will be fully credited.
Product Data Sheet

Functional Description

The IO-Link Diagnosis Tool is based on a high-speed multi-channel A/D converter that measures voltages and currents on both the C/Q and L+ lines. The captured data is transmitted via USB to the included Diagnosis Tool PC application and evaluated. The PC software runs on Windows 7 and newer.

IO-Link communication can be analyzed at the byte level, M-sequence level, protocol level, and even application level. In the latter case, the IO-Link communication is visible in plain text. Filter and search functions simplify error identification.

This enables visual monitoring in waveforms and eye diagrams for master and device signals.

Typically, the IO-Link Diagnosis Tool is inserted between the master and the device. However, an integrated IO-Link development master makes it possible to test devices without an external master. The entire communication is stored directly on a PC.

IO-Link Diagnosis Tool Functional Description

  • Time-Accurate IO-Link Signal Analysis and Monitoring
  • High-speed IO-Link synchronized ADC
  • Time-accurate Software UART Decoding
  • Optional hardware signal direction detection
  • Byte-, frame-, protocol- or IODD-based decoding
  • Advanced filter and search functions
  • Image of all transmitted data
  • Data storage image creation
  • Storage on hard drive
  • Analog signal view for UL+, IL+, UCQ, ICQ
  • Serial decoding in analog waveform view
  • Separate eye diagram view for Device and Master
  • Interactive rulers for analog measurements
  • New: Trigger-Out connection in V2.0
  • Measurement data calibration
  • Integrated Master

Advantages the IO-Link Diagnosis Tool brings you

Diagnosis Tool or IO-Link Spy – which fits when?

Both tools analyze IO-Link communication at the byte, M-sequence, protocol, and application level, including precise UART timing. The difference lies in the use case: the IO-Link Diagnosis Tool connects via cable and offers the broader feature set – analog signal display, eye diagrams, SD recording, and an integrated IO-Link master. It operates reliably even in EMC-heavy environments and remains unaffected by digital signals on the I/Q line. The IO-Link Spy, on the other hand, clips wirelessly onto the IO-Link cable and can passively sniff ongoing communication without interrupting it – ideal for troubleshooting directly during operation, when intervening in the wiring isn’t possible.

Diagnosis Tool Spy
Type of connection for capturing IO-Link communication Wired Wireless (clipped on the IO-Link cable)
USB connection to the PC yes yes
Analysis of IO-Link communication (on byte/ M-Sequence/ protocol/ application level) yes yes
Analysis of the precise timing of each UART byte yes yes
Recording IO-Link byte streams to SD card yes no
Analog features (analog signal view for UL+, IL+, UCQ and ICQ, eye diagrams, analog triggers, calibration, …) yes no
Capturing an ongoing IO-Link communication (without interrupting it) no yes
Integrated IO-Link Master yes no
Works without any issues in environments with electromagnetic disturbance. yes no
Digital signals on the I/Q line do not affect the analysis of the IO-Link communication. yes no
TEConcept IO-link Spy with Cable

IO-Link Spy

Analyzes IO-Link communication at the bitstream level, making protocol errors, timing issues, and unexpected device behavior visible — indispensable for development and troubleshooting.

Contact

For technical information, individual consultation, or project inquiries regarding IO-Link, please contact us. We will advise you on the selection of suitable IO-Link masters, sensors, or integrated solutions.
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