231-A081

Access Safety Parameter Menu

Navigate to MOD → Safety → Safety Parameters and check the axis group configuration for the reported axis group number.

Document current parameter values before making changes

Verify Drive Enable Parameters

Check parameter pp_AxGrpPermitDrvOn for the specific axis group shown in Var.=%5. Ensure values match between safety parameter sets.

Safety parameter changes require proper authorization and validation

Perform Parameter Synchronization

Execute a complete safety parameter download using MOD → Safety → Download Safety Parameters to synchronize MC and CC cores.

Always perform a safety validation test after parameter synchronization

Reset Safety System

Perform a controlled safety system reset via MOD → Safety → Reset Safety System to clear cross-comparison errors.

Ensure all axes are in safe positions before safety system reset

Check Drive Communication Status

Navigate to MOD → Diagnosis → Drive Diagnosis and verify communication status for all drives in the affected axis group.

Look for intermittent communication errors that may not trigger separate alarms

Inspect Drive Enable Signals

Use MOD → Diagnosis → PLC Status to monitor drive enable signals (M4xxx series) for the specific axis group during enable/disable cycles.

Never bypass drive enable safety circuits

Verify Cable Connections

Inspect EnDat/resolver cables and drive communication cables for the affected axis group. Check for loose connections or cable damage.

Use an oscilloscope to check signal integrity on high-speed communication lines

Test Drive Enable Sequence

Manually cycle drive enable via MOD → Manual Operation → Drive Enable and monitor for consistent response across all drives in the axis group.

Ensure machine is in safe state before manual drive enable testing

Check Safety Core Status

Navigate to MOD → Diagnosis → Safety Diagnosis and verify both MC and CC core status indicators show normal operation.

Look for timing discrepancies between core update cycles

Monitor Cross-Comparison Counters

Check cross-comparison error counters in Safety Diagnosis menu to identify patterns or frequency of synchronization failures.

Multiple cross-comparison failures indicate serious safety system issues

Perform Safety System Restart

Execute a complete TNC restart with safety system reinitialization via controlled power cycle with proper shutdown sequence.

Allow full boot sequence completion before attempting drive enable

Verify Safety Cycle Times

Check safety system cycle times in MOD → Diagnosis → Cycle Times to ensure both cores are operating within specified timing windows.

Extended safety cycle times indicate hardware performance issues

Run Hardware Diagnostics

Execute MOD → Diagnosis → Hardware Test to perform comprehensive hardware validation of safety system components.

Run diagnostics during different thermal conditions to identify temperature-sensitive faults

Check Safety I/O Status

Verify safety I/O module status in MOD → Diagnosis → I/O Diagnosis, focusing on drive enable output circuits and feedback inputs.

Faulty safety I/O can cause unpredictable machine behavior

Inspect Control Hardware

Visually inspect TNC control unit for signs of overheating, component damage, or loose connections on safety-related circuit boards.

Use thermal imaging to identify hot spots on control electronics

Document Hardware Status

Record all hardware diagnostic results and error patterns for potential warranty claims or service technician analysis.

Do not attempt hardware repairs without proper ESD protection and authorization