See what happened before the fault disappeared
Intermittent machine problems are difficult to troubleshoot because the signal you need is often gone by the time you connect an engineering tool. TRACE lets you watch PLC signals live, record them automatically and replay what happened afterward.
Connect to an Allen-Bradley PLC over EtherNet/IP and begin monitoring without loading the original PLC project.
Free · Beta · All current features included · Windows desktop application
Get TRACE
TRACE is free to use, with all current features included. Use it with compatible PLC hardware or explore the application with the built-in simulation mode.
Download TRACE BetaFree · Windows desktop application · All current features included
Version 1.11.1 Beta · 67.5 MB
This beta installer is not digitally signed. Windows may display a security warning.
For simulation and lab use. Use it on plant equipment only with the approval of your industrial security team.
Release notes and SHA-256 →Documentation
TRACE itself is closed-source, but the docs, screenshots and roadmap are public on GitHub.
View documentationTRACE is beta software and may contain errors. Validate results independently before using them to make decisions about equipment or production. TRACE is not a safety system or a replacement for approved engineering procedures.
From symptom to evidence
Connect
Enter the PLC connection information.
Monitor
Watch digital and analog signals together in real time.
Capture
Record manually or automatically when a defined signal condition occurs.
Replay
Move through the recorded event and compare signal timing using time cursors.
Four modules, one application
Live Monitoring
Monitor multiple digital and analog PLC signals simultaneously and view analog values in engineering units. Synchronized graphs make it easier to see which signal changed first and how events relate in time.
Replay
Load a recorded session and step through it with dual time cursors to measure how long an event took and how signals relate to each other.
Chain Map
A live view of configured industrial Ethernet devices, showing reachability and per-node latency to help identify potential communication problems.
Pinout Library
An offline reference for industrial connector standards: pin numbering, signal assignment, and color coding, without leaving the app.
Capture intermittent problems automatically
TRACE can start and stop recording based on a signal condition, allowing the application to capture events that may occur when nobody is watching the screen.
Replay the event
Load a recorded session and inspect the event after it has happened. Dual time cursors allow technicians and engineers to compare transitions and measure elapsed time between signal changes.
Locate potential network communication problems
Chain Map displays reachability and response times for devices in a configured industrial Ethernet chain, helping narrow down the area to investigate when communication problems occur.
Connector information without leaving the job
Open common industrial connector references directly inside TRACE, including pin numbering, signal assignments and color information.
Useful when troubleshooting equipment at the machine without switching between manuals, browser tabs and separate reference applications.
Practice troubleshooting without a physical PLC
Create digital and analog signals, load a prepared scenario, and introduce signal changes while watching the graphs. TRACE's simulation tools help students, technicians, and instructors explore signal behavior without connecting to PLC hardware.
Configure signal patterns
Choose from 13 digital and analog patterns. Adjust their parameters and add optional Gaussian noise to analog signals.
Start with a prepared scenario
Load a basic signal demo, motor start sequence, intermittent sensor problem, or analog alarm demonstration. Each scenario creates its own demo group and opens a monitoring panel automatically.
Introduce events manually
Force a simulated tag value, freeze its current value, or apply a temporary spike or dip to an analog signal before it returns to its underlying pattern.
Simulate a communication interruption
Interrupt and resume simulated updates for a panel. The interruption appears as a gap with a warning, rather than replacing missing readings with zeros.
Where to find these tools
- Configuration → Sim Pattern… configure a tag's simulation pattern.
- Monitor → Load Scenario… open a prepared demonstration.
- Simulated panel → Simulate… introduce manual events or interrupt simulated communication.
Panels containing simulated tags display a visible simulation indicator.
Why TRACE
Set up in under 2 minutes
No project files and no engineering workstation to configure first. Open it, point it at a PLC, and start reading signals.
One tool, four jobs
Live monitoring, replay, network diagnostics, and a connector reference live in a single application instead of four.
Works without a live PLC
Practice with simulated signals and prepared scenarios before connecting to physical hardware.
Explore simulation tools→Current platform support
Support for additional industrial protocols is being evaluated for future releases.
Industrial data stays local
TRACE runs on the local computer and communicates with equipment on the industrial network. Signal data, PLC tags and project information are not sent to a Siganor cloud service.
Help improve TRACE
TRACE is built around practical troubleshooting needs. If you use it in your daily work, I'd appreciate hearing what helps, what feels confusing, and what could work better. Bug reports and suggestions are welcome.
Send feedbackFrequently asked questions
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