231-B300

Check Machine Parameter MP7300

Navigate to MOD > Machine Parameters > Axis-specific parameters. Verify MP7300.x for the affected axis matches the actual brake hardware configuration.

MP7300 bit 0 enables brake monitoring, bit 1 enables brake test - ensure both are set correctly for your brake system

Verify Brake Test Timing Parameters

Check MP7301.x (brake test time) and MP7302.x (brake monitoring time) are set to appropriate values for your brake system response time.

Incorrect timing parameters can cause false alarms or inadequate brake testing

Cross-reference with PLC Configuration

Verify that the PLC brake control signals match the machine parameter settings in the axis assignment table.

Use the PLC status display to monitor brake control signals during startup sequence

Check PLC Axis Enable Status

In PLC > Status, monitor markers M4040.x through M4047.x to verify axis enable status matches the brake test requirements.

M4040.0 = X-axis enable, M4040.1 = Y-axis enable, etc. - ensure the correct axis is enabled

Review PLC Program Logic

Examine the PLC program for conditions that may be deselecting the axis during brake test execution, particularly safety interlocks or initialization sequences.

Do not bypass safety interlocks - modify the brake test timing instead

Synchronize PLC and NC Configurations

Either enable the axis in PLC or disable brake testing in MP7300.x to resolve the conflict between PLC axis status and brake test requirements.

Document any changes in the machine documentation for future reference

Monitor Brake Control Signals

Use the PLC status display to observe brake control outputs and feedback signals during the test sequence to identify timing issues.

Look for brake release signal and position feedback correlation during the test window

Adjust Brake Test Timeout Values

Increase MP7301.x (brake test time) and MP7302.x (brake monitoring time) to accommodate slower brake response if hardware is functioning correctly.

Excessive timeout values may mask actual brake failures - increase incrementally

Verify Brake Hardware Operation

Manually test brake engagement/disengagement and check brake coil resistance and supply voltage to ensure proper electrical operation.

Typical brake coils should measure 50-200 ohms resistance and receive rated voltage during operation

Check NC-MC Communication Status

Navigate to MOD > System Info > NC Status to verify communication link status between NC and MC modules.

Look for any communication error flags or timeout indicators in the system status display

Perform NC Software Reset

Execute a controlled NC reset through MOD > Reset > NC Reset to re-establish communication protocols.

Save any active programs and ensure machine is in safe position before reset

Verify System Software Versions

Check that NC and MC software versions are compatible and update if necessary through the service menu.

Document current software versions before any updates for rollback capability