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Access MOD Function Menu

Press MOD key, navigate to 'System' → 'Configuration' → 'Oscilloscope Settings' to check current parameter status.

Document current settings before making changes for rollback purposes

Reset Oscilloscope Parameters

In MOD menu, select 'Reset Oscilloscope Config' or manually clear parameters MP7300-MP7399 range if accessible.

Backup machine parameters before resetting oscilloscope configuration

Reconfigure Oscilloscope Settings

Restart TNC and reconfigure oscilloscope parameters through Setup → Oscilloscope → Configuration menu with default values.

Use conservative trigger settings initially to ensure stable operation

Verify Communication

Test oscilloscope function by accessing PLC → Diagnosis → Oscilloscope and verify parameter readback is successful.

Monitor for 5-10 minutes to ensure alarm doesn't recur

Clear Active Program Buffer

Stop all program execution, press STOP key, then clear program memory through PGM MGT → Clear → Active Program.

Ensure machine is in safe position before stopping programs

Perform Soft Reset

Execute controlled restart via MOD → System → Restart TNC to clear communication buffers without losing parameters.

Soft reset preserves machine parameters while clearing volatile buffers

Check System Load

Monitor CPU load in MOD → System → Performance Monitor, ensure oscilloscope isn't overloading system resources.

Reduce oscilloscope sampling rate if CPU load exceeds 80%

Test Incremental Loading

Gradually re-enable oscilloscope functions starting with basic monitoring to identify problematic configurations.

Enable one oscilloscope channel at a time to isolate issues

Power Down System Safely

Execute proper shutdown sequence via MOD → System → Shutdown, then disconnect main power and wait 5 minutes.

Follow lockout/tagout procedures and ensure all axes are secured

Inspect Interface Connections

Check all ribbon cables and connectors between main CPU board and oscilloscope interface module for proper seating.

Look for corrosion, bent pins, or cable damage at connection points

Reseat Interface Cards

Remove and reinstall oscilloscope interface card and related communication modules in TNC cabinet.

Use anti-static precautions and ensure proper card orientation

Test Hardware Diagnostics

Power up and run built-in hardware test via MOD → Diagnosis → Hardware Test → Interface Cards.

Document any failed test results for service technician reference

Check Software Versions

Access MOD → System → Version Info to document TNC software version and oscilloscope module firmware versions.

Note exact version numbers including build dates for compatibility verification

Review Recent Updates

Check MOD → System → Update History to identify any recent software changes that coincide with alarm occurrence.

Correlate alarm first occurrence with update timestamps

Load Compatible Firmware

If version mismatch identified, load compatible oscilloscope firmware through MOD → System → Firmware Update.

Ensure firmware compatibility before updating - incorrect firmware can damage hardware

Verify System Integration

After firmware update, test all oscilloscope functions through Setup → Oscilloscope → Function Test menu.

Run extended test cycle to ensure stable operation across all oscilloscope features