84850000 hex

I/O Power Supply ON Detected

Omron · NJ/NX-series Machine Automation Controller

What does 84850000 hex mean?

The NX Unit detected that the I/O power supply was turned ON. This is an informational event confirming the successful detection of the I/O power supply status by the NX Unit.

Common Causes

  • The I/O power supply was turned ON.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Measure the input voltage to the I/O power supply unit to ensure stability and conformity with specified tolerances.

  2. 2

    Measure the output voltage from the I/O power supply unit at the connection points to the NX I/O modules, confirming stable and correct voltage levels.

  3. 3

    Inspect all power and communication cabling between the I/O power supply and the NX I/O modules for secure connections, signs of damage, or potential intermittent contact.

  4. 4

    Review the Omron NJ/NX controller's event log for the frequency and sequence of the 'I/O Power Supply ON Detected' event (84850000 hex) to identify any patterns of instability or unexpected power cycling.

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Verified technical data. Last updated: March 2026

Related Faults

Source: Omron NJ/NX-series Machine Automation Controller