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FaultTrace — VacuumPC_Controller.L5X
2
Critical
14
Warnings
8
Info
6
Programs
847
Rungs
2,104
Tags
🔴 Duplicate OTE: Conv3_Fault
Tag "Conv3_Fault" has OTE in 2 locations (MainProgram/Conv3_Control R8, MainProgram/Safety_Interlocks R3). Last scanned wins — the earlier OTE is overwritten silently every scan.
→ Consolidate to one location, or use OTL/OTU if both rungs need to control this tag.
🟡 VFD fault reset with no one-shot: VSD_1150.Q_ResetFault
P0035_VacuumAPC/R0041_VFD Rung 13: ClearFaults runs every scan while conditions are true. The drive faults, resets, faults, resets — masking the real problem.
→ Add a ONS so the reset fires once per button press. Add a retry counter — 3 faults in 60 seconds, lock out and require maintenance.
🟡 Drive output with no safety check: VSD_3508:O.Start
P0060_HopperTanks/R0510_VSD Rung 84: The run command has no guard, E-stop, or safety interlock on this rung.
→ Add a safety interlock condition on this rung, or verify the permissive chain using the Trace tab.
+ 21 more findings...
33
real L5X files tested
12,000+
rungs analyzed
<3s
parse time
0
data uploaded

What you get

Drop an L5X, get answers

⚡

Code Analysis

Catches duplicate outputs, unconditional logic, latch/unlatch mismatches, unused tags, redundant rungs, and more.

🔌

VFD & Drive Safety

Finds run commands with no feedback, unhandled drive faults, reset loops without one-shots, missing guard interlocks.

🔍

Logic Tracing

Pick any output tag — see the full permissive chain, kill conditions, and single points of failure. Builds your troubleshooting checklist.

📊

Cross-Reference

Every tag, where it's read and written. Search by module name to see every rung that touches a drive or I/O point.

🏗️

AOI Deep Scan

Parses inside your Add-On Instructions — not just your main programs. Same analysis, same rules, everywhere.

📥

Export Report

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✅ What we collect
  • • File size and element counts
  • • Which rules fired (counts only)
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🚫 What we never capture
  • • Tag names or rung logic
  • • Program or routine names
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FAQ

Does my file get uploaded anywhere?
No. Your L5X file is parsed entirely in your browser — nothing is uploaded, transmitted, or stored. You can disconnect from the internet before using it and it still works.
What files does it support?
Allen-Bradley L5X exports from Studio 5000 and RSLogix 5000 — ControlLogix and CompactLogix. Siemens TIA Portal support is coming soon.
Does it work on my phone?
Yes. Fully responsive — works on phone, tablet, and laptop. You can install it as an app from your browser. Useful at the panel.
Is there a paid version?
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