Omron · NJ/NX-series Machine Automation Controller
The main circuit power supply voltage (P-N voltage) exceeded the operation guarantee range. This indicates an unsafe voltage level in the main power circuit, which can damage components.
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Measure the incoming AC supply voltage at the main circuit power terminals of the Omron controller and compare it to the specified nominal voltage range.
Inspect all main circuit power wiring and connections for looseness, corrosion, or damage that could lead to voltage instability.
Verify the proper operation of upstream surge protection devices (SPDs) and line filters to mitigate potential transient overvoltage events.
Check the Omron controller's configured power supply monitoring parameters and input voltage thresholds to ensure they align with the actual installation and manufacturer specifications.