231-9260

Access machine parameters

Press MOD key, select 'Machine Parameters', navigate to MP72xx series motor parameters for the affected axis.

Always document original parameter values before making changes

Verify motor parameter changes

Check MP7210 (motor type), MP7220 (rated motor speed), MP7230 (rated motor current) for recent modifications.

Never change motor parameters while machine is in automatic mode

Execute complete drive shutdown

Turn off main power, wait 30 seconds for capacitor discharge, then power up system to reinitialize motor parameters.

Use controlled shutdown via PLC rather than emergency stop for clean parameter reset

Perform axis reference

Execute reference run for affected axis using Manual mode, verify smooth operation and proper following error limits.

Check axis movement at reduced feedrate initially

Check encoder parameters

Navigate to MP74xx series, verify MP7410 (encoder type), MP7420 (lines per revolution), MP7430 (encoder monitoring) settings.

Cross-reference encoder parameters with motor nameplate data

Validate parameter consistency

Ensure encoder parameters match motor specifications and verify MP7440 (encoder direction) is correctly set for motor rotation.

Incorrect encoder direction can cause runaway conditions

Reset drive system

Power down servo drives via main contactor, wait for complete discharge, then restart with new encoder parameters active.

Monitor diagnostic display during startup for parameter acceptance confirmation

Access servo diagnostics

Press DIAG key, select 'Servo', choose affected axis to display real-time servo amplifier status and parameter state.

Look for parameter transfer status indicators in diagnostic display

Force parameter download

In servo diagnostics, select 'Parameter Transfer' to force TNC to resend all motor parameters to servo amplifier.

Ensure axis is not under load during parameter transfer

Verify amplifier acceptance

Monitor parameter transfer completion status and check for any rejected parameters in servo amplifier memory.

Some amplifiers require specific sequence for parameter acceptance

Perform drive enable test

Enable servo drive and test axis movement at low speed to confirm parameter synchronization between TNC and amplifier.

Keep hand near emergency stop during initial movement test

Identify parameter source

Check if parameters were loaded from backup file, service software, or manual entry while system was operational.

Review parameter change log in TNC event history

Restore stable configuration

Load known good parameter set from backup or restore original motor parameters before the problematic change.

Verify parameter backup date matches last known good operation

Implement proper change procedure

Schedule parameter changes during planned downtime with complete system shutdown and restart cycle.

Create parameter change checklist to prevent future hot-swap attempts