PLC Fault Code Search Engine
Search engine for Siemens, Mitsubishi, and Omron error codes.
How to Find PLC Error Codes?
Siemens (S7-1200/1500)
Connect via TIA Portal, go to Online & Diagnostics > Diagnostic Buffer. Look for the Hex Event ID (e.g., 16# 0x2521).
Mitsubishi (FX/Q/L)
Use GX Works2/3. Go to Diagnostics > System Monitor. Check special register SD0 for the latest error code (e.g., 4100).
Omron (CJ/NJ)
For CJ2, check the 2-digit LED on the CPU (e.g., HE, E0). For NJ/NX, use Sysmac Studio Troubleshooting to find the 8-digit Event Code.
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