0100

CW Limit Stop Input Signal

Omron · SYSMAC CJ Series PLC

What does 0100 mean?

This fault indicates that the pulse output operation was stopped due to a CW limit signal input. This typically occurs during an origin search function, signifying that the machine has reached its positive travel limit, preventing further movement in the CW direction.

Common Causes

  • CW limit switch physically activated during an origin search.
  • Miswiring of the CW limit signal input, causing a false trigger.
  • Incorrect 'Limit Input Signal Type' (NC or NO) configured in PLC Setup for the CW limit switch.

Repair Steps & Checklist

Click steps to track your progress.

  1. 1

    Manually move the driven axis in the CCW (counter-clockwise) direction until the CW limit switch is physically disengaged.

  2. 2

    Measure continuity or voltage at the CW limit input terminal to verify signal status (ON/OFF) and expected voltage level (e.g., 24VDC for ON, 0VDC for OFF) based on the configured 'Limit Input Signal Type' in PLC Setup.

  3. 3

    Access the PLC Setup 'I/O Module Tab Page' using CX-Programmer and verify the 'Limit Input Signal Type' parameter is correctly set to 'NC (Normally Closed)' or 'NO (Normally Open)' matching the physical switch.

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Verified technical data. Last updated: March 2026

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