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Troubleshooting C203A0 Safety Settings Mismatch (PolyScope X)

Fix the C203A0 safety settings mismatch fault on a Universal Robots cobot running PolyScope X. Unlock the Safety screen with ursafe and apply the new safety settings.

Written by Doug Ayers

This article is for robots running PolyScope X. If your robot runs PolyScope 5, see Troubleshooting C203A0 Safety Settings Mismatch (PolyScope 5).

If fault C203A0 appears after a Beacon URCap install or update, this is expected — this article will fix it.

What You'll See

  • Fault code C203A0 on the teach pendant

  • The robot arm in fault state — programs won't run

Fix the Fault

Before you apply the safety configuration, make sure the correct Beacon program for your application is loaded on the teach pendant. The safety settings applied in these steps are tied to the currently loaded program — applying them with the wrong program loaded will not clear the fault.

If your robot runs welding, see Setting the Correct Startup Program for Beacon Welding. For other applications (painting, cutting, etc.) the steps are the same but select your application's program instead of welding_program.

The whole fix happens on the Safety screen. Unlock it with the safety password, apply the new settings, then reload.

  1. Tap OK to dismiss the fault.

    PolyScope X C203A0 fault dialog with OK button

  2. Tap Application. Then tap Safety.

    PolyScope X Application menu showing Safety option

  3. Tap Unlock.

    PolyScope X Safety screen showing Unlock button

  4. If prompted, enter the safety password (ursafe). Tap Confirm.

    PolyScope X safety password prompt

  5. Tap Apply.

    PolyScope X Safety screen showing Apply button

  6. Tap Apply and restart. This reloads the application. The robot keeps running.

    PolyScope X Apply and restart confirmation

  7. Tap Confirm Configuration.

    PolyScope X Confirm Configuration prompt

  8. Tap the menu icon in the top-right. Tap Reload.

    PolyScope X menu showing Reload option

  9. Tap Reload to confirm.

    PolyScope X Reload confirmation dialog

How to Verify

After the reload, fault C203A0 should not appear. The robot arm starts up normally. You can run programs normally.

Still Need Help?

Tap the Support menu in Beacon to send us a message. It helps if you can share:

  • A photo of any error messages on the teach pendant

  • Your robot's serial number (printed on a label on the robot's base)

  • Whether the Beacon URCap was recently installed or updated

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