231-E02B

Access Safety Machine Parameters

Navigate to MOD > Machine Parameters > Safety Parameters and locate SMP587 (Safety Input Test Configuration).

Document current SMP587 values before making changes for rollback purposes.

Verify SMP587 Configuration

Check SMP587 bit settings against machine documentation. Verify test group assignments and input polarity settings match actual hardware configuration.

Incorrect safety parameter changes can compromise machine safety - consult machine documentation.

Validate Test Group Settings

Cross-reference SMP587 test group configuration with actual PLC input wiring and safety circuit design.

Use TNCdiag to monitor real-time safety input states during parameter verification.

Reset Safety System

After parameter correction, perform safety system reset via MOD > Reset > Safety Reset to reinitialize SKERN-CC test cycles.

Identify Affected Test Group

Use TNCdiag > Safety > Input Status to identify which test group input (%5 referenced in alarm) is failing the dynamic test.

Monitor input states during manual test output activation to isolate wiring issues.

Verify Test Output Wiring

Check test output connections from safety PLC to input test circuits. Verify test output can properly switch input to 0V during test cycle.

Use lockout/tagout procedures when checking safety circuit wiring.

Measure Test Circuit Continuity

With power off, verify continuity of test circuit wiring from test output through safety input circuit back to PLC input terminal.

Check for proper isolation between test groups to prevent cross-talk during testing.

Validate Input Response

Manually activate test output and verify corresponding safety input switches to 0 level using TNCdiag input monitoring.

Access IOC Configuration

Navigate to PLC > Configuration > IOC File and examine safety input definitions for test group %5.

Compare IOC timestamp with recent configuration changes to identify potential corruption.

Verify Safety Input Mapping

Check IOC file safety input assignments match physical PLC input terminals and safety circuit design.

Backup current IOC file before making modifications.

Validate Test Configuration

Ensure IOC file test group definitions align with SMP587 settings and actual test output wiring configuration.

Use IOC validation tool to check for configuration conflicts or missing definitions.

Reload IOC Configuration

After corrections, reload IOC file via PLC > Configuration > Load IOC and perform safety system restart.

Check HSCI Status

Navigate to MOD > Diagnosis > Communication > HSCI Status and examine communication error counters and connection status.

Monitor HSCI status during safety test cycles to identify intermittent communication issues.

Verify HSCI Cable Integrity

Inspect HSCI communication cables for damage, proper connection, and correct termination resistance.

Power down system before disconnecting HSCI communication cables.

Reset HSCI Communication

Perform HSCI reset via MOD > Reset > Communication Reset to clear communication buffers and re-establish connection.

Check for electromagnetic interference sources near HSCI cables that could cause communication disturbances.

Monitor Communication Recovery

Use TNCdiag communication monitoring to verify stable HSCI communication before restarting safety test cycles.